JavaScript Comparison Operators
Last Updated :
21 Nov, 2024
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JavaScript comparison operators are essential tools for checking conditions and making decisions in your code.
1. Equality Operator (==)
The Equality operator is used to compare the equality of two operands.
// Illustration of (==) operator
let x = 5;
let y = '5';
// Checking of operands
console.log(x == 5);
console.log(y == 5);
console.log(x == y);
console.log();
// Check against special values
console.log(NaN == NaN);
console.log(0 == false);
console.log(0 == null);
// Illustration of (==) operatorlet x = 5;let y = '5';​// Checking of operandsconsole.log(x == 5);console.log(y == 5); console.log(x == y);​console.log();​// Check against special valuesconsole.log(NaN == NaN);console.log(0 == false); console.log(0 == null);Output
true true true false true false
2. Inequality Operator (!=)
The Inequality Operator is used to compare the inequality of two operands.
// Illustration of (!=) operator
let x = 5;
let y = '5';
// Checking of operands
console.log(x != 6);
console.log(y != '5');
console.log(x != y);
console.log();
// Check against special values
console.log(0 != false);
console.log(0 != null);
console.log(NaN != NaN);
// Illustration of (!=) operatorlet x = 5;let y = '5';​// Checking of operandsconsole.log(x != 6);console.log(y != '5'); console.log(x != y);​console.log();​// Check against special valuesconsole.log(0 != false); console.log(0 != null);console.log(NaN != NaN);Output
true false false false true true
3. Strict equality Operator (===)
The Strict equality Operator is used to compare the equality of two operands with type.
// Illustration of (===) operator
let x = 5;
let y = '5';
// Checking of operands
console.log(x === 6);
console.log(y === '5');
console.log(x === y);
console.log();
// Check against special values
console.log(NaN === NaN);
console.log(0 === false);
console.log(0 === null);
// Illustration of (===) operatorlet x = 5;let y = '5';​// Checking of operandsconsole.log(x === 6);console.log(y === '5'); console.log(x === y);​console.log();​// Check against special valuesconsole.log(NaN === NaN); console.log(0 === false); console.log(0 === null);Output
false true false false false false
4. Strict inequality Operator (!==)
The Strict inequality Operator is used to compare the inequality of two operands with type.
// Illustration of (!==) operator
let x = 5;
let y = '5';
// Checking of operands
console.log(x !== 6);
console.log(y !== '5');
console.log(x !== y);
console.log();
// Check against null and boolean value
console.log(0 !== false);
console.log(0 !== null);
console.log(NaN !== NaN);
// Illustration of (!==) operatorlet x = 5;let y = '5';​// Checking of operandsconsole.log(x !== 6);console.log(y !== '5'); console.log(x !== y);​console.log();​// Check against null and boolean valueconsole.log(0 !== false); console.log(0 !== null);console.log(NaN !== NaN);Output
true false true true true true
5. Greater than Operator (>)
The Greater than Operator is used to check whether the left-side value is greater than the right-side value.
// Illustration of (>) operator
let x = 5;
let y = "5";
// Checking of operands
console.log(x > 0);
console.log(y > "10");
console.log(x > "10");
console.log(y > 0);
// Illustration of (>) operatorlet x = 5;let y = "5";​// Checking of operandsconsole.log(x > 0);console.log(y > "10"); console.log(x > "10");console.log(y > 0);Output
true true false true
6. Greater than or equal Operator (>=)
The Greater than or equal Operator is used to check whether the left side operand is greater than or equal to the right side operand.
// Illustration of (>=) operator
let x = 5;
let y = "5";
// Checking of operands
console.log(x >= 5);
console.log(y >= "15");
console.log(x >= "5");
console.log(y >= 15);
// Illustration of (>=) operatorlet x = 5;let y = "5";​// Checking of operandsconsole.log(x >= 5);console.log(y >= "15"); console.log(x >= "5");console.log(y >= 15);Output
true true true false
7. Less than Operator (<)
The Less than Operator is used to check whether the left-side value is less than the right-side value.
// Illustration of (<) operator
let x = 5;
let y = "5";
// Checking of operands
console.log(x < 15);
console.log(y < "0");
console.log(x < "0");
console.log(y < 15);
// Illustration of (<) operatorlet x = 5;let y = "5";​// Checking of operandsconsole.log(x < 15);console.log(y < "0"); console.log(x < "0");console.log(y < 15);Output
true false false true
8. Less than or equal Operator (<=)
The Less than or equal Operator is used to check whether the left side operand value is less than or equal to the right side operand value.
// Illustration of (<=) operator
let val1 = 5;
let val2 = "5";
// Checking of operands
console.log(val1 <= 15);
console.log(val2 <= "0");
console.log(val1 <= "0");
console.log(val2 <= 15);
// Illustration of (<=) operatorlet val1 = 5;let val2 = "5";​// Checking of operandsconsole.log(val1 <= 15);console.log(val2 <= "0"); console.log(val1 <= "0");console.log(val2 <= 15);Output
true false false true
Comparison Operators List
There are many comparison operators as shown in the table with the description.
OPERATOR NAME | USAGE | OPERATION |
|---|---|---|
| Equality Operator | a == b | Compares the equality of two operators |
| Inequality Operator | a != b | Compares inequality of two operators |
| Strict Equality Operator | a === b | Compares both the value and type of the operand |
| Strict Inequality Operator | a !== b | Compares inequality with type |
| Greater than Operator | a > b | Checks if the left operator is greater than the right operator |
| Greater than or equal Operator | a >= b | Checks if the left operator is greater than or equal to the right operator |
| Less than Operator | a < b | Checks if the left operator is smaller than the right operator |
| Less than or equal Operator | a <= b | Checks if the left operator is smaller than or equal to the right operator |
Recommended Link
JavaScript Operators Complete Reference.
JavaScript Cheat Sheet-A Basic guide to JavaScript.
