Plus Arithmetic Operation

Question

I\'ve tried use Plus Arithmetic Operation to calculate 2 input text type number values, but my result was the values are \"together\", like that:

Answer 1

You can try this:

function cal(){
    var plus = +document.getElementById('plus').value,
        plus1 = +document.getElementById('plus1').value;
    var x = plus + plus1;
    var result = document.getElementById('result');
    if(isNaN(plus) || isNaN(plus1) || result.value == ""){
     result.innerHTML = "?";
    }
    else{
     result.innerHTML = x;
    }
  }

Notice the + signs that convert the two string values to numbers.