C# series 1.1d : Operator

An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations.

There are Four types of operators listed below :

1. Arithmetic Operators

example subtraction :

int x = 10;
int y = 4;
Console.WriteLine(x-y);

// outputs 6

example division :

Division
the division operator ( / ) divides the first operand by the second. If the operands are both integers, any remainder is dropped in order to return an integer value.

int x = 10 / 4;
Console.WriteLine(x);

// outputs 2
division by 0 is undefined and will crash your program.

example modulus :

Modulus
the modulus operator ( % ) is informally known as the remainder operator because it returns the remainder of an integer division.

int x = 25 % 7 ;
Console.WriteLine( x );

// outputs 4

example Prefix & poarfix forms :
a. The increment operator has two forms, prefix and postfix.

++x; // prefix
x++; // postfix

prefix increaments the value and then proceeds with the expression.
postfix evaluates the expression and then performs the incrementing.

prefix example :
int x = 3;
int y = ++x;
// x is 4, y is 4

postfix example :
int x = 3;
int y = x++;
// x is 4, y is 3

The prefix example increments the value of x and then assigns it to y.
The postfix example assigns the value of x to y and then increments x.

b. The Decrement operator
The decrement operator ( -- ) works in much the same way as the increment operator but instead of increasing the value , it decreases it by one.

--x; // prefix
x--; // postfix


2. Relational Operator

Use relational operators to evaluate conditions. in addition to the less than ( < ) and greater than ( > ) operator, the following operators are available :

example :
if (a == b)
{
     Console.WriteLine("equal");
}

// Display equal if the value of a is equal to the value of b

3. Logical Operator

4. Assignment Operators

Next : C# series 1.2 : Variables