javascript if less or equal or greater than code example

Example 1: less than or equal to javascript

if(a <= 5){
   yourFunction();
}

Example 2: javascript less than but greater than

let X = 4
let Y = 5
let Z = 8

if (Y < Z && Y > X) {
    console.log(`Y is less than Z but greater than X, or mathematically
	'X < Y < Z' or 'Z > Y > X'
	`);
}