Last Updated : 23 Jul, 2025
JavaScript Strict Inequality Operator is used to compare two operators and return true if they both are unequal. It is the opposite of the Strict Equality operator but like the Strict Equality Operator, it also does not perform type conversion.
Syntax:
a!==b
Example 1: In this example, we will use the inequality operator on the same data types.
JavaScript
let a = 2; b=2, c=3;
let d = {name:"Ram"};
let e = {name:"Ram"};
let f = e;
console.log(a!==b);
console.log(a!==c);
console.log(d!==e);
console.log(f!==e);
Output: Since the objects, d, and e contain the same value but have different references so true is returned but objects f and e have the same reference so false is returned.
false true true false
Example 2: In this example, we will use the strict inequality operator on different data types.
JavaScript
let a = 2;
let b="2";
let c = true;
let d = null;
let e = undefined;
console.log(a!==b);
console.log(a!==c);
console.log(d!==e);
Output:
true true true
Supported Browsers:
We have a complete list of JavaScript Comparison Operators, to check those please go through, the JavaScript Comparison Operator article
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