Sum of two numbers

This is a warmup question, so take your time and focus more on exploring the editor's features rather than the challenge.

Objective: Write a function that takes two numbers as input and returns their sum.

Instructions:

1. Write a function named sum that accepts two arguments (both numbers).
2. The function should return the sum of the two input numbers.

Expected Output:

sum(5, 3); // Output: 8
sum(10, -2); // Output: 8

Requirements:

• Function should return the sum of the two input numbers
• Function works correctly with both positive and negative numbers
• Function handles invalid inputs