Initialize your variables first, then compare using if statement and assign new values where necessary . var a = "red"; var b; if(a=="red"){ b="hot"; } else{ b="cold"; }

Nov 11, 2019 · Method 1: If the condition evaluates to true, the value on the left side of the column would be assigned to the variable. If the condition evaluates to false the condition on …

The if/else statement is a part of JavaScript's "Conditional" Statements, which are used to perform different actions based on different conditions. In JavaScript we have the following conditional …

Headache example: var foo = 10; function myfunc() { if (foo > 0) { var foo = 0; alert('foo was greater than 0'); } else { alert('wut?'); } } Guess what, we're getting a 'wut?' alert when calling …

Use the if statement to specify a block of JavaScript code to be executed if a condition is true. Syntax

Mar 13, 2025 · The var statement declares function-scoped or globally-scoped variables, optionally initializing each to a value.

Start the statement with var and separate the variables by comma: Declare many variables in one statement. Start the statement with let and separate the variables by comma: Using var in a …

Feb 10, 2025 · When a variable is declared using var, it is function-scoped or globally-scoped, depending on where it is declared. Syntax. It declares a variable using var, assigns it a value, …

Mar 21, 2023 · In programming, we use an if statement when we want our code to make a decision. In this tutorial, we'll deep dive into the JavaScript if statement. Along the way, we'll …

Dec 3, 2008 · Sometimes functions can sneak in largely unnoticed; that's the case with accessor functions. Here's an example: var obj = { value: 0, get f() { return this.value; }, set f(v) { …