How to express less than or equal to in javascript

In JavaScript, less than or equal to can be represented by the "

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

In JavaScript, less than or equal to can be expressed using the "

"

The "

The "

Example:

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

console.log(3 <= 3);
// expected output: true

// Compare bigint to number (note: bigint is not supported in all browsers)
console.log(3n <= 5);
// expected output: true

console.log(&#39;aa&#39; <= &#39;ab&#39;);
// expected output: true

Syntax:

x <= y

• If the left operand is less than or equal to the right operand, return true, otherwise return false.

Usage of less than or equal to (

String and string comparison

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

String and numerical 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

Comparison of numerical values ​​and numerical values

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

##Comparison of numerical values ​​and large integers

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

Compare Boolean, null, undefined and 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

[Recommended learning:

javascript advanced tutorial】

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