There are a list of words already defined in CPP library, same as in C. These reserved words are called as CPP Keywords. Every keyword is defined to serve a specific purpose. These keywords when used in CPP codes performs a specific operation during compilation. A Keyword in CPP is restricted to be used as a variable, a function or an identifier.
Keywords used in CPP are listed below:
auto | double | int | struct |
break | else | long | switch |
case | enum | register | typedef |
char | extern | return | union |
const | float | short | unsigned |
continue | for | signed | void |
default | goto | sizeof | volatile |
do | if | static | while |
Example:
#include <iostream.h> using namespace std; int main() { int num; cout << "Enter your age: "; cin >> num; cout << “You are ” << num << “ years old.”; return 0; } |
Output:
Enter your age: 10 You are 10 years old. |