In this article, we are going to learn various types of looping statements in JavaScript with syntax, example and explanation.
In this tutorial, we are going to learn about maps and for…of loops in JavaScript with Examples.
The JavaScript code in the following example defines a loop that starts with i=1. It will then print the output and increase the value of variable i by 1. After that the condition is evaluated, and the loop will continue to run as long as the variable i is less than, or equal to ...
What are loops in JavaScript? Loops simply run a chunk of codemultiple times.For example, take a look at this code: alert('Hi!'); If we wanted torepeat this five times,we could do this: alert('Hi!');alert('Hi!');alert('Hi!');alert('Hi!');alert('Hi!'); However, this is ...
Running the JavaScript code above will result in the following output. Output [ 0 ] [ 0, 1 ] [ 0, 1, 2 ] We set a loop that runs untili < 3is no longertrue, and we’re telling the console to print thearrayExamplearray to the console at the end of each iteration. With this ...
forEach do...while while for...in for...of for...in vs for...ofIntroductionJavaScript provides many way to iterate through loops. This tutorial explains each one with a small example and the main properties.forconst list = ['a', 'b', 'c'] for (let i = 0; i < list.length;...
1. while Loop in C While loop executes the code until the condition is false. Syntax: while(condition){ //code } Example: #include<stdio.h> void main() { int i = 20; while( i <=20 ) { printf ("%d " , i ); i++;
There is one feature of JavaScript that might cause a few headaches to developers, related to loops and scoping.Take this example:const operations = [] for (var i = 0; i < 5; i++) { operations.push(() => { console.log(i) }) } for (const operation of operations) { operation(...
for (const propertyName in theArray) { if (/*...is an array element property (see below)...*/) { const element = theArray[propertyName]; // ...use `element`... } } Some quick "don't"s: Don't usefor-inunless you use it with safeguards or are at least aware of why it ...
For example, the same code above could be expressed as follows: JavaScript var i; for (i = 0; i <= 4; i++) { console.log(i); } Here, i is declared in line 1 separately. Inside the for loop's header in line 2, it's only assigned the value 0 to begin with. Now while th...