Question

How to create Variables and Constants in C++?

Answer 1

>>>Using const keyword: The const keyword specifies that a variable or object value is constant and can’t be modified at the compilation time

$<font color=blue>// C program to demonstrate const specifier #include <stdio.h> int main() { const int num = 1; num = 5; // Modifying the value return 0; } It will throw as error like: error: assignment of read-only variable ‘num’$

$<font color = black>>>> Using enum keyword: Enumeration (or enum) is a user defined data type in C and C++. It is mainly used to assign names to integral constants, that make a program easy to read and maintain.$

$<font color = blue>// In C and C++ internally the default // type of 'var' is int enum VARS { var = 42 }; // In C++ 11 (can have any integral type): enum : type { var = 42; } // where mytype = int, char, long etc. // but it can't be float, double or // user defined data type.$