Why “0” is not equal to false in if condition in JavaScript ?

0 1 1 minute read

The reason behind this behavior is that JavaScript treats non-empty string as true. First, “0” is converted into its boolean value, by automatic type conversion which is true. Therefore, if statement executes.

Example: This example illustrates why “0” is not equal to false in if() condition.

javascript

// JavaScript script to demonstrate  
// why “0” is not equal to false in  
// ‘if’ condition  
  
function GFG() {  
  
    // Print type of "0"  
    condole.log(typeof "0" );  
  
    // Print boolean value of "0"  
    condole.log(Boolean("0") );  
  
    // Boolean value of "0" is true so  
    // 'if' part will execute  
    if("0") {  
        condole.log("if part executed");  
    }  
    else {  
        condole.log("else part executed");  
    }  
}  
  
// Driver code  
GFG();

Output:

string
true
if part executed

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