[Add] Basic introduction to for loops in javascript

Author: infinotiver

Tutorials/Basic/loops/for loops/01_for_loops.js

@@ -0,0 +1,65 @@
+// 01_for_loops.js
+/*
+This code snippet shows the usage of for loops in JavaScript.
+The For loop is used to run a piece of code  specified times
+For Loops iterates through a block of code until the counter reaches a specified number
+For loop consists of 3 statements ()
+For loop is most used loop in JavaScript
+*/
+
+
+/* 
+Basic Syntax
+
+    for (statement 1; statement 2; statement 3) {
+    // Code to be executed
+    } 
+*/
+
+
+/*
+    for(initialization; condition; final expression) {
+    // Code to be executed
+    } 
+*/
+
+for (var i = 0; i < 20; i++) {
+    console.log(i)
+}
+
+// Finding odd numbers 
+
+let oddNumberArray1 = []
+
+for (var i = 0; i < 20; i++) {
+    if (i % 2 != 0) {
+        oddNumberArray1.push(i)
+    }
+}
+console.log(oddNumberArray1)
+
+// Alternate  way
+
+let oddNumberArray2 = []
+for (var i = 1; i < 20; i += 2) {
+    oddNumberArray2.push(i)
+}
+console.log(oddNumberArray2)
+
+// Finding even numbers
+
+let evenNumberArray = []
+
+for (var x = 0; x < 20; x += 2) {
+    evenNumberArray.push(x)
+}
+console.log(evenNumberArray)
+
+// Counting backwards 
+
+let backwardCounting = []
+
+for (var x = 20; x > 0; x--){
+    backwardCounting.push(x)
+}
+console.log(backwardCounting)