JavaScript parseInt Calculations Tutorial

This tutorial converts a user-inputted string value and determines whether the number typed in is positive, negative or zero.

Run the script and type in any positive, negative or neutral number.

Code Example
  1. function loop() {
  2. number=parseInt(prompt("Enter a number",""));
  3. if(number>0) {
  4. document.getElementById('loops').innerHTML += (number + " is a positive value<br />");
  5. } else
  6. if(number==0) {
  7. document.getElementById('loops').innerHTML += (number + " is zero<br />");
  8. } else {
  9. document.getElementById('loops').innerHTML += (number + " is NOT a positive value<br />");
  10. }
  11. }