How to reverse a number in JS

Question

I've already searched around in the Q/A answers, but I couldn't find it, can anyone please help me?

Answer 1

you can do that in two ways. The string way. and the mathematical way.
the string way is this:
function reverseNum(num){
var num_func = num.toString();
var reverseNumber ="";
for(var x=num_func.length-1;x>=0;x--){
reverseNumber+=num_func[x];

}
return reverseNumber;
}

the math way is this:
function reverseNum(num){
var y=0;
while(num>0){
y*=10;
y+=num%10;
num= Math.floor(num/10)
}
return y;
}

Answer 2

How is this shorter then writing reverseNum?
anyway, You're using functions without knowing how they work.

Answer 3

Thanks, but I've got this from a friend
document.write(t.split('').reverse().join(''))
This is probably the string way, but it works a little smaller for large codes where I have to use it over 20 times

Answer 4

Sorry, I didn't read your answer very well, I thought I had to put the whole code every time