feat: Day 2 assignment

[anonfedora]

Add Functions for Arithmetic Operations, String Manipulation, and Even Check

Description

This PR introduces the following features to enhance the functionality of the application:

1. Check if the Sum of Two Integers is Even

   • Added is_even(x: i32, y: i32) function to determine if the sum of two integers is even.
   • Supports additional utility function sum_even(x: i32, y: i32) to calculate the sum of two integers.

2. Floating-Point Arithmetic Operations

   • Addition: sum(x: f32, y: f32)
   • Subtraction: subtract(x: f32, y: f32)
   • Division: divide(x: f32, y: f32)
   • Multiplication: multiply(x: f32, y: f32)
   • Modulo: modulo(x: f32, y: f32)

3. String Concatenation

   • Added say_name(first_name: &str, surname: &str) function to concatenate and display full names in a formatted message.

Sample Outputs

• Even Check

  • Input: (5, 5) → Output: Is Even? false. The sum of the numbers, 5 and 5.
  • Input: (22, 21) → Output: Is Even? false. The sum of the numbers, 22 and 21.

• Arithmetic Operations
  Example:

  The sum is 15.04
  The subtraction is 5.20
  The division is 1.44
  The multiplication is 159.81
  The modulo is 5.10
  

• String Concatenation

  • Input: ("Eleazar", "Anonefdora") → Output: Hello, Eleazar Anonefdora