- ES6 Tutorial
- ES6 - Home
- ES6 - Overview
- ES6 - Environment
- ES6 - Syntax
- ES6 - Variables
- ES6 - Operators
- ES6 - Decision Making
- ES6 - Loops
- ES6 - Functions
- ES6 - Events
- ES6 - Cookies
- ES6 - Page Redirect
- ES6 - Dialog Boxes
- ES6 - Void Keyword
- ES6 - Page Printing
- ES6 - Objects
- ES6 - Number
- ES6 - Boolean
- ES6 - Strings
- ES6 - Symbol
- ES6 - New String Methods
- ES6 - Arrays
- ES6 - Date
- ES6 - Math
- ES6 - RegExp
- ES6 - HTML DOM
- ES6 - Iterator
- ES6 - Collections
- ES6 - Classes
- ES6 - Maps And Sets
- ES6 - Promises
- ES6 - Modules
- ES6 - Error Handling
- ES6 - Object Extensions
- ES6 - Reflect API
- ES6 - Proxy API
- ES6 - Validations
- ES6 - Animation
- ES6 - Multimedia
- ES6 - Debugging
- ES6 - Image Map
- ES6 - Browsers
- ES7 - New Features
- ES8 - New Features
- ES9 - New Features
- ES6 Useful Resources
- ES6 - Quick Guide
- ES6 - Useful Resources
- ES6 - Discussion
ES6 - for loop
The for loop executes the code block for a specified number of times. It can be used to iterate over a fixed set of values, such as an array. Following is the syntax of the for loop.
var num = 5 var factorial=1; for( let i = num ; i >= 1; i-- ) { factorial *= i ; } console.log(factorial);
The for loop has three parts: the initializer (i = num), the condition ( i>=1) and the final expression (i--).
The program calculates the factorial of the number 5 and displays the same. The for loop generates the sequence of numbers from 5 to 1, calculating the product of the numbers in every iteration.
Multiple assignments and final expressions can be combined in a for loop, by using the comma operator (,). For example, the following for loop prints the first eight Fibonacci numbers −
Example
"use strict" for(let temp, i = 0, j = 1; j<30; temp = i, i = j, j = i + temp) console.log(j);
The following output is displayed on successful execution of the above code.
1 1 2 3 5 8 13 21
Advertisements