Preogess Level 2 Day 5

Solutions by devHarsh007/DAY_5.js

@@ -116,9 +116,14 @@ const findMax = (a, b, c) => {
 // ===============================================================================================================================================
 
 
-// Linear equation is calculated as follows: ax + by + c = 0. Write a function which calculates value of a linear equation, solveLinEquation.
 
+
+// Linear equation is calculated as follows: ax + by + c = 0. Write a function which calculates value of a linear equation, solveLinEquation.
+const solveLinEquation = () => {
+    return (-c - by) / a;
+}
 // Quadratic equation is calculated as follows: ax2 + bx + c = 0. Write a function which calculates value or values of a quadratic equation, solveQuadEquation.
+// same as before
 // console.log(solveQuadratic()) // {0}
 // console.log(solveQuadratic(1, 4, 4)) // {-2}
 // console.log(solveQuadratic(1, -1, -2)) // {2, -1}
@@ -126,47 +131,143 @@ const findMax = (a, b, c) => {
 // console.log(solveQuadratic(1, 0, -4)) //{2, -2}
 // console.log(solveQuadratic(1, -1, 0)) //{1, 0}
 
-// Declare a function name printArray.It takes array as a parameter and it prints out each value of the array.
-
-// Write a function name showDateTime which shows time in this format: 08 / 01 / 2020 04: 08 using the Date object.
+// Declare a function name printArray. It takes array as a parameter and it prints out each value of the array.
+const printArray = (arr) => {
+    for (let i of arr) {
+        console.log(i + "\n");
+    }
+}
+// Write a function name showDateTime which shows time in this format: 08/01/2020 04:08 using the Date object.
+const showDateTime = () => {
+    const dates = new Date();
+}
 // showDateTime()
-// 08 / 01 / 2020 04: 08
-
-// Declare a function name swapValues.This function swaps value of x to y.
+// 08/01/2020 04:08
+
+// Declare a function name swapValues. This function swaps value of x to y.
+const swapValues = (x, y) => {
+    x = x + y;
+    y = x - y;
+    x = x - y;
+    return (x, y);
+}
 // swapValues(3, 4) // x => 4, y=>3
 // swapValues(4, 5) // x = 5, y = 4
 
-// Declare a function name reverseArray.It takes array as a parameter and it returns the reverse of the array(don't use method).
-// console.log(reverseArray([1, 2, 3, 4, 5]))
-// //[5, 4, 3, 2, 1]
-// console.log(reverseArray(['A', 'B', 'C']))
-// //['C', 'B', 'A']
+// Declare a function name reverseArray. It takes array as a parameter and it returns the reverse of the array (don't use method).
+const reverseArray = (arr) => {
+    output = Array();
+    for (let i of arr) {
+        output.unshift(i);
+    }
+    return output;
+}
 
 // Declare a function name capitalizeArray.It takes array as a parameter and it returns the - capitalizedarray.
+const capitalizedArray = (arr) => {
+    let output = [];
+    for (let i of arr) {
+        output.push(i.toUpperCase());
+    }
+    return output;
+}
 
 // Declare a function name addItem.It takes an item parameter and it returns an array after adding the item
+function addItem(...item) {
+    let output = [];
+    for (let i of item) {
+        output.push(i);
+    }
+    return output;
+}
 
 // Declare a function name removeItem.It takes an index parameter and it returns an array after removing an item
+function removeItem(arr, index) {
+    arr.removeItem(arr.charAt(index));
+}
 
 // Declare a function name sumOfNumbers.It takes a number parameter and it adds all the numbers in that range.
+function sumOfNumbers(num) {
+    let sum = 0;
+    for (let i = 1; i <= num; i++) {
+        sum += i;
+    }
+    return sum;
+}
 
 // Declare a function name sumOfOdds.It takes a number parameter and it adds all the odd numbers in that - range.
+function sumOfOdds(num) {
+    let sum = 0;
+    for (let i = 1; i <= num; i++) {
+        if (i % 2 != 0) {
+            sum += i;
+        }
+    }
+    return sum;
+}
 
 // Declare a function name sumOfEven.It takes a number parameter and it adds all the even numbers in that - range.
+function sumOfEven(num) {
+    let sum = 0;
+    for (let i = 1; i <= num; i++) {
+        if (i % 2 === 0) {
+            sum += i;
+        }
+    }
+    return sum;
+}
 
 // Declare a function name evensAndOdds.It takes a positive integer as parameter and it counts number of evens and odds in the number.
 //     evensAndOdds(100);
 // The number of odds are 50.
 // The number of evens are 51.
+function evensAndOdds(num) {
+    let numOdd = 0;
+    let numEven = 0;
+    let sumEven = 0;
+    let sumOdd = 0;
+    for (let i = 1; i <= num; i++) {
+        if (i % 2 === 0) {
+            sumEven += i;
+            numEven += 1;
+        }
+        else {
+            sumOdd += i;
+            numOdd += 1;
+        }
+    }
+    let statmentOdd = `The number of Odds are ${numOdd}`;
+    let statementEven = `The number of Evens are ${numEven}`;
+}
 
 // Write a function which takes any number of arguments and return the sum of the arguments
 // sum(1, 2, 3) // -> 6
 // sum(1, 2, 3, 4) // -> 10
+function sumOfArgs(...nums) {
+    let sum = 0;
+    for (let i of nums) {
+        sum += i;
+    }
+    return sum;
+}
+
+// Write a function which generates a randomUserIp.
+function genRandnum() {
+    return Math.floor(Math.random() * 11);
+}
+function RandomUserIp() {
+    let ipArr = [];
+    for (let i = 0; i < 4; i++) {
+        ipArr.push(Math.floor(Math.random() * 256))
+    }
+    let ip = ipArr.join(".");
+    return ip;
 
-// Writ a function which generates a randomUserIp.
+}
 
 // Write a function which generates a randomMacAddress
 
+
 // Declare a function name randomHexaNumberGenerator.When this function is called it generates a random hexadecimal number.The function return the hexadecimal number.
 
 //     console.log(randomHexaNumberGenerator());