From e302906562964d6e1e449b008901da02b336e793 Mon Sep 17 00:00:00 2001 From: sapiensFactor Date: Sat, 24 Jun 2023 15:26:46 +0530 Subject: [PATCH] fixed typos and improved readability --- 07_Day_Functions/07_day_functions.md | 68 +++++++++++++++------------- 1 file changed, 36 insertions(+), 32 deletions(-) diff --git a/07_Day_Functions/07_day_functions.md b/07_Day_Functions/07_day_functions.md index 17d9087..75fdd62 100644 --- a/07_Day_Functions/07_day_functions.md +++ b/07_Day_Functions/07_day_functions.md @@ -43,10 +43,10 @@ ## Functions -So far we have seen many builtin JavaScript functions. In this section, we will focus on custom functions. What is a function? Before we start making functions, lets understand what function is and why we need function? +So far we have seen many built-in JavaScript functions. In this section, we will focus on custom functions. What is a function? Before we start making functions, lets understand what a function is and why we need function? A function is a reusable block of code or programming statements designed to perform a certain task. -A function is declared by a function key word followed by a name, followed by parentheses (). A parentheses can take a parameter. If a function take a parameter it will be called with argument. A function can also take a default parameter. To store a data to a function, a function has to return certain data types. To get the value we call or invoke a function. +A function is declared by a function keyword followed by a name, followed by parentheses (). A parentheses can take a parameter. If a function take a parameter(s), it will be called with argument(s). A function can also take a default parameter. To store a data to a function, a function has to return certain data types. To get the value we call or invoke a function. Function makes code: - clean and easy to read @@ -179,7 +179,7 @@ function sumTwoNumbers(numOne, numTwo) { console.log(sum) } sumTwoNumbers(10, 20) // calling functions -// If a function doesn't return it doesn't store data, so it should return +// If a function doesn't return a value, it doesn't store data, so it should return function sumTwoNumbers(numOne, numTwo) { let sum = numOne + numTwo @@ -416,8 +416,8 @@ function greetings(name = 'Peter') { return message } -console.log(greetings()) -console.log(greetings('Asabeneh')) +console.log(greetings()) // 'Peter, welcome to 30 Days of JavaScript!' +console.log(greetings('Asabeneh')) // 'Asabeneh, welcome to 30 Days of JavaScript!' ``` ```js @@ -427,8 +427,8 @@ function generateFullName(firstName = 'Asabeneh', lastName = 'Yetayeh') { return fullName } -console.log(generateFullName()) -console.log(generateFullName('David', 'Smith')) +console.log(generateFullName()) // 'Asabeneh Yetayeh' +console.log(generateFullName('David', 'Smith')) // 'David Smith' ``` ```js @@ -437,7 +437,7 @@ function calculateAge(birthYear, currentYear = 2019) { return age } -console.log('Age: ', calculateAge(1819)) +console.log('Age: ', calculateAge(1819)) // Age: 200 ``` ```js @@ -446,8 +446,10 @@ function weightOfObject(mass, gravity = 9.81) { return weight } -console.log('Weight of an object in Newton: ', weightOfObject(100)) // 9.81 gravity at the surface of Earth -console.log('Weight of an object in Newton: ', weightOfObject(100, 1.62)) // gravity at surface of Moon +console.log('Weight of an object in Newton: ', weightOfObject(100)) // 981 +// 9.81 gravity at the surface of Earth +console.log('Weight of an object in Newton: ', weightOfObject(100, 1.62)) // 162 +// gravity at surface of Moon ``` Let us see how we write the above functions with arrow functions @@ -472,8 +474,8 @@ const greetings = (name = 'Peter') => { return message } -console.log(greetings()) -console.log(greetings('Asabeneh')) +console.log(greetings()) // 'Peter, welcome to 30 Days of JavaScript!' +console.log(greetings('Asabeneh')) // 'Asabeneh, welcome to 30 Days of JavaScript!' ``` ```js @@ -483,28 +485,30 @@ const generateFullName = (firstName = 'Asabeneh', lastName = 'Yetayeh') => { return fullName } -console.log(generateFullName()) -console.log(generateFullName('David', 'Smith')) +console.log(generateFullName()) // 'Asabeneh Yetayeh' +console.log(generateFullName('David', 'Smith')) // 'David Smith' ``` ```js const calculateAge = (birthYear, currentYear = 2019) => currentYear - birthYear -console.log('Age: ', calculateAge(1819)) +console.log('Age: ', calculateAge(1819)) // 200 ``` ```js const weightOfObject = (mass, gravity = 9.81) => mass * gravity + ' N' -console.log('Weight of an object in Newton: ', weightOfObject(100)) // 9.81 gravity at the surface of Earth -console.log('Weight of an object in Newton: ', weightOfObject(100, 1.62)) // gravity at surface of Moon +console.log('Weight of an object in Newton: ', weightOfObject(100)) // 981 +// 9.81 gravity at the surface of Earth +console.log('Weight of an object in Newton: ', weightOfObject(100, 1.62)) // 162 +// gravity at surface of Moon ``` ### Function declaration versus Arrow function It Will be covered in other section. -🌕 You are a rising star, now you knew function . Now, you are super charged with the power of functions. You have just completed day 7 challenges and you are 7 steps a head in to your way to greatness. Now do some exercises for your brain and for your muscle. +🌕 You are a rising star, now you knew function . Now, you are super charged with the power of functions. You have just completed day 7 challenges and you are 7 steps ahead in to your way to greatness. Now do some exercises for your brain and for your muscle. @@ -521,10 +525,10 @@ It Will be covered in other section. 7. Area of a circle is calculated as follows: _area = Ï€ x r x r_. Write a function which calculates _areaOfCircle_ 8. Circumference of a circle is calculated as follows: _circumference = 2Ï€r_. Write a function which calculates _circumOfCircle_ 9. Density of a substance is calculated as follows:_density= mass/volume_. Write a function which calculates _density_. -10. Speed is calculated by dividing the total distance covered by a moving object divided by the total amount of time taken. Write a function which calculates a speed of a moving object, _speed_. +10. Speed is calculated by dividing the total distance covered by a moving object divided by the total amount of time taken. Write a function which calculates speed of a moving object, _speed_. 11. Weight of a substance is calculated as follows: _weight = mass x gravity_. Write a function which calculates _weight_. -12. Temperature in oC can be converted to oF using this formula: _oF = (oC x 9/5) + 32_. Write a function which convert oC to oF _convertCelsiusToFahrenheit_. -13. Body mass index(BMI) is calculated as follows: _bmi = weight in Kg / (height x height) in m2_. Write a function which calculates _bmi_. BMI is used to broadly define different weight groups in adults 20 years old or older.Check if a person is _underweight, normal, overweight_ or _obese_ based the information given below. +12. Temperature in °C can be converted to °F using this formula: _°F = (°C x 9/5) + 32_. Write a function which convert °C to °F _convertCelsiusToFahrenheit_. +13. Body mass index(BMI) is calculated as follows: _bmi = weight in kg / (height x height) in $m^2$_. Write a function which calculates _bmi_. BMI is used to broadly define different weight groups in adults, 20 years old or older. Check if a person is _underweight, normal, overweight_ or _obese_ based the information given below. - The same groups apply to both men and women. - _Underweight_: BMI is less than 18.5 @@ -532,8 +536,8 @@ It Will be covered in other section. - _Overweight_: BMI is 25 to 29.9 - _Obese_: BMI is 30 or more -14. Write a function called _checkSeason_, it takes a month parameter and returns the season:Autumn, Winter, Spring or Summer. -15. Math.max returns its largest argument. Write a function findMax that takes three arguments and returns their maximum with out using Math.max method. +14. Write a function called _checkSeason_, it takes a month parameter and returns the season: Autumn, Winter, Spring or Summer. +15. Math.max returns its largest argument. Write a function findMax that takes three arguments and returns their maximum without using Math.max() method. ```js console.log(findMax(0, 10, 5)) @@ -545,7 +549,7 @@ It Will be covered in other section. ### Exercises: Level 2 1. Linear equation is calculated as follows: _ax + by + c = 0_. Write a function which calculates value of a linear equation, _solveLinEquation_. -1. Quadratic equation is calculated as follows: _ax2 + bx + c = 0_. Write a function which calculates value or values of a quadratic equation, _solveQuadEquation_. +1. Quadratic equation is calculated as follows: _a$x^2$ + bx + c = 0_. Write a function which calculates value or values of a quadratic equation, _solveQuadEquation_. ```js console.log(solveQuadratic()) // {0} @@ -571,7 +575,7 @@ It Will be covered in other section. swapValues(4, 5) // x = 5, y = 4 ``` -1. Declare a function name _reverseArray_. It takes array as a parameter and it returns the reverse of the array (don't use method). +1. Declare a function name _reverseArray_. It takes array as a parameter and it returns the reverse of the array (don't use _Array.reverse()_ method). ```js console.log(reverseArray([1, 2, 3, 4, 5])) @@ -580,13 +584,13 @@ It Will be covered in other section. //['C', 'B', 'A'] ``` -1. Declare a function name _capitalizeArray_. It takes array as a parameter and it returns the - capitalizedarray. +1. Declare a function name _capitalizeArray_. It takes array as a parameter and it returns the capitalized array. 1. Declare a function name _addItem_. It takes an item parameter and it returns an array after adding the item 1. Declare a function name _removeItem_. It takes an index parameter and it returns an array after removing an item 1. Declare a function name _sumOfNumbers_. It takes a number parameter and it adds all the numbers in that range. 1. Declare a function name _sumOfOdds_. It takes a number parameter and it adds all the odd numbers in that - range. 1. Declare a function name _sumOfEven_. It takes a number parameter and it adds all the even numbers in that - range. -1. Declare a function name evensAndOdds . It takes a positive integer as parameter and it counts number of evens and odds in the number. +1. Declare a function name evensAndOdds . It takes a positive integer as parameter and it counts number of evens and odds between zero and the number. ```sh evensAndOdds(100); @@ -601,7 +605,7 @@ It Will be covered in other section. sum(1, 2, 3, 4) // -> 10 ``` -1. Writ a function which generates a _randomUserIp_. +1. Write a function which generates a _randomUserIp_. 1. Write a function which generates a _randomMacAddress_ 1. Declare a function name _randomHexaNumberGenerator_. When this function is called it generates a random hexadecimal number. The function return the hexadecimal number. @@ -638,7 +642,7 @@ It Will be covered in other section. ' ``` -1. Write a function name _rgbColorGenerator_ and it generates rgb colors. +1. Write a function called _rgbColorGenerator_ and it generates rgb colors. ```sh rgbColorGenerator() @@ -664,10 +668,10 @@ It Will be covered in other section. 1. Call your function _sum_, it takes any number of arguments and it returns the sum. 1. Write a function called _sumOfArrayItems_, it takes an array parameter and return the sum of all the items. Check if all the array items are number types. If not give return reasonable feedback. 1. Write a function called _average_, it takes an array parameter and returns the average of the items. Check if all the array items are number types. If not give return reasonable feedback. -1. Write a function called _modifyArray_ takes array as parameter and modifies the fifth item of the array and return the array. If the array length is less than five it return 'item not found'. +1. Write a function called _modifyArray_ takes array as parameter and modifies(capitalize) the fifth item of the array and return the array. If the array length is less than five it return 'item not found'. ```js - console.log(modifyArray(['Avocado', 'Tomato', 'Potato','Mango', 'Lemon','Carrot']); + console.log(modifyArray(['Avocado', 'Tomato', 'Potato','Mango', 'Lemon','Carrot'])); ``` ```sh @@ -701,7 +705,7 @@ It Will be covered in other section. [(1, 4, 5, 7, 9, 8, 0)] ``` -1. Write a function called reverseCountries, it takes countries array and first it copy the array and returns the reverse of the original array +1. Write a function called _reverseCountries_, it takes countries array and first it copy the array and returns the reverse of the original array 🎉 CONGRATULATIONS ! 🎉