Sum of two input value by jquery

Question

I have code :

function compute() {
    if ($(\'input[name=type]:checked\').val() != undefined) {
        var a = $(\'input[name=service_price]\').val();
             


        

Answer 1

Cast them to a Number

$('#total_price').val(Number(a)+Number(b));

But before you do that

if (!isNaN($('input[name=service_price]').val()) {...