Add Two Integers

easy math

Problem

You are given two integers num1 and num2. Return their sum, num1 + num2.

Inputnum1 = 12, num2 = 5

Output17

12 + 5 == 17.

num1

num2

def sum(num1, num2):
    total = num1 + num2
    return total

function sum(num1, num2) {
  const total = num1 + num2;
  return total;
}

class Solution {
    public int sum(int num1, int num2) {
        int total = num1 + num2;
        return total;
    }
}

int sum(int num1, int num2) {
    int total = num1 + num2;
    return total;
}

Explanation

This is about as direct as a problem gets: we are handed two integers and asked for their sum. There is no clever trick, no edge case to chase down — the + operator already does exactly what we need.

We compute num1 + num2 and hand the result straight back. Storing it in a local variable called total is purely for readability; you could just as well return num1 + num2 in a single line.

The only thing worth a moment's thought is the value range. The inputs sit comfortably inside the signed 32-bit range, and their sum never overflows it, so a plain int is enough in Java and C++ (in Python and JavaScript integers grow as needed anyway).

Example: num1 = 12, num2 = 5. Adding them gives 12 + 5 = 17, which is the answer we return.

Time: O(1) Space: O(1)