JavaScript less than or equal to

JavaScript less than or equal to operator (<=) returns true if the left operand is less than or equal to the right operand, and false otherwise.

x <= y

JavaScript less than or equal to

Simple example code function first evaluates if the condition (num <=25) evaluates to true converting num to a number if necessary.

If it does, it returns the statement between the curly braces (“Smaller Than or Equal to 25”). If it doesn’t, it checks if the next condition is true (returning “Smaller Than or Equal to 25”). Otherwise the function will return “More Than 50”.

<!DOCTYPE html>
<html>
<body>
  <div></div>
  <script>

    function lessEqual(num) {
      if (num <= 25) return "Smaller Than or Equal to 25";

      if (num <= 50) return "Smaller Than or Equal to 50";

      return "More Than 50";
    }
    console.log(lessEqual(50));  
    console.log(lessEqual(10)); 
    console.log(lessEqual(75)); 
  </script>
</body>
</html>

Output:

JavaScript less than or equal to Operator

More examples

console.log(5 <= 3);//false

console.log(3 <= 3); // true

// Compare bigint to number
console.log(3n <= 5); // true

console.log('aa' <= 'ab'); // true

String to string comparison

console.log("a" <= "b");     // true
console.log("a" <= "a");     // true
console.log("a" <= "3");     // false

String to number comparison

console.log("5" <= 3);       // false
console.log("3" <= 3);       // true
console.log("3" <= 5);       // true

console.log("hello" <= 5);   // false
console.log(5 <= "hello");   // false

Number to Number comparison

console.log(5 <= 3);         // false
console.log(3 <= 3);         // true
console.log(3 <= 5);         // true

Comparing Boolean, null, undefined, NaN

console.log(true <= false);  // false
console.log(true <= true);   // true
console.log(false <= true);  // true

console.log(true <= 0);      // false
console.log(true <= 1);      // true

console.log(null <= 0);      // true
console.log(1 <= null);      // false

console.log(undefined <= 3); // false
console.log(3 <= undefined); // false

console.log(3 <= NaN);       // false
console.log(NaN <= 3);       // false

Do comment if you have any doubts or suggestions on this JS comparison topic.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version

JavaScript less than or equal to | Operator