Lecture Overview: Operators in C++

Welcome to Nesso Academy's Chapter 3, focusing on operators in C++. This chapter will cover various types of operators, specifically starting with arithmetic operators.

Topics Covered

1. Introduction to Arithmetic Operators

   • Purpose: Perform basic mathematical operations such as addition, subtraction, multiplication, and division.
   • Applicable Numeric Types: Works primarily with int, float, and double.

2. Unary Arithmetic Operators

   • Definition: Operators that require one operand.
   • Types:
     • Unary Plus: Does not affect the numeric value.
     • Unary Minus: Changes the sign of the numeric value.
   • Examples:

     int val = -4;
     cout << +val; // Output: -4
     cout << -val; // Output: 4
     

   • Recommendation: Avoid using unary plus as it is not impactful.

3. Binary Arithmetic Operators

   • Definition: Operators that operate on two operands.
   • List of Operations and Examples:
     • Addition (+): 10 + 3 results in 13.
     • Subtraction (-): 10 - 3 results in 7.
     • Multiplication (*): 10 * 3 results in 30.
     • Division (/): 10 / 3 results in 3 (integer division).
     • Modulus (%): 10 % 3 results in 1.

4. Important Points about Arithmetic Operators

   • Floating Point Division: Result is floating point if either operand is floating point:

     12 / 5.0 // Output: 2.4
     

   • Integer Division: Result is integer if both operands are integers:

     12 / 5 // Output: 2
     

   • Division by Zero: Causes runtime error.
   • Division by 0.0: May result in INF (infinity) or NaN (not a number), depending on system representation (IEEE 754).

This concludes the lecture on arithmetic operators in C++. Thank you for attending, and see you in the next session!