eraygundogmus
5 years ago
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/* ## 💻 Day 3: Exercises
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### Exercises: Level 1
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1. Declare firstName, lastName, country, city, age, isMarried, year variable and assign value to it and use the typeof operator to check different data types.
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2. Check if type of '10' is equal to 10
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3. Check if parseInt('9.8') is equal to 10
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4. Boolean value is either true or false.
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1. Write three JavaScript statement which provide truthy value.
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2. Write three JavaScript statement which provide falsy value.
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5. Figure out the result of the following comparison expression first without using console.log(). After you decide the result confirm it using console.log()
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1. 4 > 3
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2. 4 >= 3
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3. 4 < 3
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4. 4 <= 3
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5. 4 == 4
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6. 4 === 4
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7. 4 != 4
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8. 4 !== 4
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9. 4 != '4'
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10. 4 == '4'
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11. 4 === '4'
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12. Find the length of python and jargon and make a falsy comparison statement.
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6. Figure out the result of the following expressions first without using console.log(). After you decide the result confirm it by using console.log()
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1. 4 > 3 && 10 < 12
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2. 4 > 3 && 10 > 12
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3. 4 > 3 || 10 < 12
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4. 4 > 3 || 10 > 12
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5. !(4 > 3)
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6. !(4 < 3)
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7. !(false)
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8. !(4 > 3 && 10 < 12)
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9. !(4 > 3 && 10 > 12)
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10. !(4 === '4')
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11. There is no 'on' in both dragon and python
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7. Use the Date object to do the following activities
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1. What is the year today?
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2. What is the month today as a number?
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3. What is the date today?
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4. What is the day today as a number?
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5. What is the hours now?
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6. What is the minutes now?
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7. Find out the numbers of seconds elapsed from January 1, 1970 to now.
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### Exercises: Level 2
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1. Write a script that prompt the user to enter base and height of the triangle and calculate an area of a triangle (area = 0.5 x b x h).
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```sh
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Enter base: 20
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Enter height: 10
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The area of the triangle is 50
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```
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1. Write a script that prompt the user to enter side a, side b, and side c of the triangle and and calculate the perimeter of triangle (perimeter = a + b + c)
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```sh
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Enter side a: 5
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Enter side b: 4
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Enter side c: 3
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The perimeter of the triangle is 12
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```
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1. Get length and width using prompt and calculate an area of rectangle (area = length x width and the perimeter of rectangle (perimeter = 2 x (length + width))
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1. Get radius using prompt and calculate the area of a circle (area = pi x r x r) and circumference of a circle(c = 2 x pi x r) where pi = 3.14.
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1. Calculate the slope, x-intercept and y-intercept of y = 2x -2
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1. Slope is (m = y2-y1/x2-x1). Find the slope between point (2, 2) and point(6,10)
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1. Compare the slope of above two questions.
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1. Calculate the value of y (y = x^2 + 6x + 9). Try to use different x values and figure out at what x value y is 0.
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1. Writ a script that prompt a user to enter hours and rate per hour. Calculate pay of the person?
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```sh
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Enter hours: 40
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Enter rate per hour: 28
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Your weekly earning is 1120
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```
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1. If the length of your name is greater than 7 say, your name is long else say your name is short.
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1. Compare your first name length and your family name length and you should get this output.
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```js
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let firstName = 'Asabeneh'
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let lastName = 'Yetayeh'
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```
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```sh
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Your first name, Asabeneh is longer than your family name, Yetayeh
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```
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1. Declare two variables _myAge_ and _yourAge_ and assign them initial values and myAge and yourAge.
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```js
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let myAge = 250
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let yourAge = 25
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```
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```sh
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I am 225 years older than you.
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```
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1. Using prompt get the year the user was born and if the user is 18 or above allow the user to drive if not tell the user to wait a certain amount of years.
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```sh
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Enter birth year: 1995
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You are 25. You are old enough to drive
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Enter birth year: 2005
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You are 15. You will be allowed to drive after 3 years.
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```
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1. Write a script that prompt the user to enter number of years. Calculate the number of seconds a person can live. Assume some one lives just hundred years
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```sh
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Enter number of yours you live: 100
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You lived 3153600000 seconds.
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```
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1. Create a human readable time format using the Date time object
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1. YYYY-MM-DD HH:mm
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2. DD-MM-YYYY HH:mm
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3. DD/MM/YYYY HH:mm
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### Exercises: Level 3
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1. Create a human readable time format using the Date time object. The hour and the minute should be all the time two digits(7 hours should be 07 and 5 minutes should be 05 )
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1. YYY-MM-DD HH:mm eg. 20120-01-02 07:05
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*/
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// 1
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const firstName = 'Eray'
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const lastName = undefined
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const isMarried = true
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const city = 'Istanbul'
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const age = 20
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// 2
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/* 4 > 3 true
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4 >= 3 true
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4 < 3 false
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4 <= 3 false
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4 == 4 true
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4 === 4 true
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4 != 4 false
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4 !== 4 false
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4 != '4' true
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4 == '4' false
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4 === '4' false
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Find the length of python and jargon and make a falsy comparison statement.
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*/
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/*
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4 > 3 && 10 < 12 true
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4 > 3 && 10 > 12 false
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4 > 3 || 10 < 12 true
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4 > 3 || 10 > 12 true
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!(4 > 3) false
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!(4 < 3) true
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!(false) true
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!(4 > 3 && 10 < 12)
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!(4 > 3 && 10 > 12)
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!(4 === '4')
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There is no 'on' in both dragon and python */
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// 7
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//i
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const now = new Date()
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console.log(now.getFullYear())
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)
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//ii
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console.log(now.getMonth() + 1)
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//iii
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console.log(now)
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//iv
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console.log(now.getDay())
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//v
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console.log(now.getHours())
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//vi
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console.log(now.getMinutes())
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//vii
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console.log(now.getTime())
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// Exercise Level 2
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const triangleBase = 20
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const triangleHeight = 10
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const triangleArea = function(a,b){
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let area = 0
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return area = a*b*(0.5)
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}
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triangleArea(triangleBase,triangleHeight)
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//
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const triPerimeter = function (a,b,c){
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return a + b + c
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}
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triPerimeter(1,2,3)
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//
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const returner = function(a){
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let math = Math.sqrt(a)
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return math
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}
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//
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const circPerim = function(r){
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let math = (3.14)*2*r
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return math
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}
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//
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const myFunct = function(x){
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let y = (x*x) + (6*x) + 9
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return y
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}
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//
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const calculater = function(x,y){
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const all = (x * y)
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const all2 = (x * y * 4)
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return all && all2
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'Weekly salary: ${all} Monthly salary: ${all2}'
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}
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//
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const nameMessage = (name) => {
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let myName = name
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if (myName.length > 7) {
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console.log('your age is long')
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} else {
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console.log('Your age is short')
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}
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}
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//
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const compareNames = (firstName,lastName) => {
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let ad = firstName
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let soyad = lastName
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if (ad.length > soyad.length){
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console.log('your firstname is longer than your lastname')
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} else if (ad.length == soyad.length){
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console.log('your first name and your lastname is equal')
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} else {
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console.log('your lastname is longer than your firstname')
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}
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}
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// That was hard tho
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const compareAges = (x,y) => {
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let diff = (x - y)
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let txt = `X is ${diff} years older`
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let txt2= `Y is ${(-1 * diff)} years older`
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let txt3= `ages are equal`
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if (diff > 0){
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return txt
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} else if (diff == 0){
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return txt3
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} else {
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return txt2
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}
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}
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//
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const driveYear = (year) => {
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const now = new Date()
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const birth = year
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const age = (now.getFullYear()) - year
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if (age >= 18){
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return `you are allowed`
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} else { return `you cant drive. you can drive after ${(18 - age)} years.` }
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}
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driveYear(2005)
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// How much second I live
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const getMin = (year) => {
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const now = new Date()
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const birth = year
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const age = (now.getFullYear()) - year
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return (age * (365 * 24 * 60 * 60)) + ((age/4) * (24 * 60 * 60))
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}
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//
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