JAVASCRIPT IS NOT ADDING NUMBERS.

Question

I am having trouble with javascript, and i need help. If i add a number, using return statement is does not work, it will just add the numbers like 12 + 12, it will give me output 1212. But if i use other maths operators, it is working. See what i have do:
function maTH(first_Num, second_Num){
return first_Num + second_Num;
}
document.write(maTH(prompt("Input First Number"), prompt("Input Second Number")));

Answer 1

When you say prompt() it returns a string by default, so 12+12 is added like a string. You must cast the value to a number type and you can either use Number(prompt()) or parseInt(prompt()).

Strings see '+' as concatenating operator. And just like Abhay mentioned, the string with just numeric values are implicitly converted to numbers and the operation is performed on them.

Answer 2

Thank you for your help. It works. If to say i have the chance to mark many as the best answers, i could have mark all, because it works.

But even thought, it is like i have marked all. Thanks🙋🙋🙋🙋

Answer 3

prompt returns a string ,using + on two strings concatenates them ,when using other operator ,they are implicitly converted to numbers