C & C++ Programming
Computer ScienceChapter 2 — Variables, Data Types and Operators
Lesson 2.3 : Constants and Type Modifiers
Reading & Interactive Lesson
Constants and Type Modifiers
Reading Material & Notes
Constants and Type Modifiers
A constant is a value that should not be changed during program execution.
Constants
const int MAX = 100;The const keyword prevents the value from being modified.
Type Modifiers
C and C++ provide modifiers such as short, long, signed and unsigned.
unsigned int count;
long int population;
short int value;Using Constants
#include <iostream>
using namespace std;
int main()
{
const double PI = 3.14159;
cout << PI;
return 0;
}Constants are useful for values such as mathematical constants, configuration values and fixed limits.
Course Curriculum
10 Chapters • 50 Lessons
Chapter 1 — Introduction to C and C++
5 Lessons
Chapter 2 — Variables, Data Types and Operators
5 Lessons
Chapter 3 — Conditional Statements and Loops
5 Lessons
Chapter 4 — Functions and Modular Programming
5 Lessons
Chapter 5 — Arrays and Strings
5 Lessons
Chapter 6 — Pointers and References
5 Lessons
Chapter 7 — Structures, Unions and Enumerations
5 Lessons
Chapter 8 — Object-Oriented Programming in C++
5 Lessons
Chapter 9 — Inheritance, Polymorphism and Templates
5 Lessons
Chapter 10 — File Handling and Mini Projects
5 Lessons