I'm having trouble making an account using javascript:
num1 = $("#num1").val(); // exemplo 2
num2 = $("#num2").val(); // exemplo 50
result = num1+num2;
This code results in 250 instead of 52
It looks like it's concatenating instead of adding.
How to fix this error?
you need to transform to integer for this use the function parseInt first for example:
num1 = parseInt($("#num1").val()); // exemplo 2
num2 = parseInt($("#num2").val()); // exemplo 50
result = num1+num2;
You are by default javascript concatenated, because in val () it takes a string, to perform the sum you need to convert to numbers, which can be float (numbers with,) or int (integer only),
num1 = parseInt($("#num1").val()); // exemplo 2
num2 = parseFloat($("#num2").val()); // exemplo 50,4
result = num1+num2;
The values are textual and not numeric. To receive exact values, whether floating or integer, you can use Number ():
result = Number(num1) + Number(num2)
Or you can use this solution too:
result = num1 * 1 + num2 * 1
In any case, if the text contains non-numeric characters, you must use parseInt (string) or parseFloat (string).
You need to convert to number using for example parseInt ( ) .
In javascript the + sign in type string is to concatenate, in type number is to add.
The value you are receiving from .val() is string . Being a string the code thinks you want to join 50 after 2 and that's 250 .
Take a look here:
num1 = $("#num1").val();
num2 = parseInt($("#num2").val()); // usando o parseInt()
console.log(typeof num1); // string
console.log(typeof num2); // number