C++ Arithmetic Operators

Introduction

We can do arithmetic operations using arithmetic operators.

Some of them are: 

+ // addition 
- // subtraction 
* // multiplication 
/ // division 
% // modulo

Example: 

#include <iostream> 

int main() /*w ww  .  ja v a2s. c  o  m*/
{ 
    int x = 123; 
    int y = 456; 
    int z = x + y; // addition 
    z = x - y; // subtraction 
    z = x * y; // multiplication 
    z = x / y; // division 
    std::cout << "The value of z is: " << z << '\n'; 
}

The integer division results in a value of 0.

It is because the result of the integer division where both operands are integers is truncated towards zeros.

In the expression x / y, x and y are operands and / is the operator.

To get a floating-point result, use the type double and make sure at least one of the division operands is also of type double: 

#include <iostream> 

int main() /*from w  ww  .  ja  v  a2 s .c o m*/
{ 
    int x = 123; 
    double y = 456; 
    double z = x / y; 
    std::cout << "The value of z is: " << z << '\n'; 
}

Similarly, we can have: 

#include <iostream> 

int main() /*w ww .j a va 2  s  .  co  m*/
{ 
    double z = 123 / 456.0; 
    std::cout << "The value of z is: " << z << '\n'; 
}

and the result would be the same.




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