how to check if an input is a decimal in javascript code example

Example 1: javascript how to take off a decimal

function png(){
    return Math.trunc(Math.random() * 10);
}
//Removes the decimal without rounding

Example 2: how to know if a number has a decimal number js

function hasDecimal (num) {
	return !!(num % 1);
}
hasDecimal(2) // true
hasDecimal(2.345) // false