Arithmetic Operators

Arithmetic Operators are those which we use in order to perform mathematical operations.

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Following table shows all the arithmetic operators supported by C language.

Operators	What They Do ..	Precedence
++	Performs Increment (by 1) on Operand	1
--	Performs Decrement (by 1) on Operand	1
*	Performs Multiplication on Operands	2
/	Performs Division on Operands	2
%	Performs Modulus operation on Operands , gives remainder after complete division	2
+	Performs Addition on Operands	3
-	Performs Subtraction on Operands	3

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Increment (++)

The Increment-Decrement Operators work by adding/subtracting 1 from the number.

They are of 2 types :

Pre (++x) : First increments the value and then uses it.

Post (x++) : First uses the value then increments it.

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Syntax:

 ++[variable] or [variable]++

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Example:

int main()

{

  int a=10;

  printf("a=%d",a);  //Value in memory and printed : a=10

  a++;                      // Value in memory : a=11;

  printf("\na=%d",a);   

  printf("\na=%d",a++);  // Value 1st  Printed (  a=11 ) then changed in memory...

  printf("\na=%d",a);   // Value of a = 12

  return 0;

}

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Decrement (--)

The Decrement Operators work by subtracting 1 from the number.

They are of 2 types :

Pre (--x) : First decrements the value and then uses it.

Post (x--) : First uses the value then decrements it.

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Syntax:

  --[variable] or [variable]--

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Example:

#include<stdio.h>

int main() {

	int a=10;

	printf("a=%d",a);

	//Value in memory and printed : a=10

	a--;

	// Value in memory : a=9;

	printf("\na=%d",a);

	printf("\na=%d",a--);

	// Value 1st  Printed (  a=9 ) then changed in memory...

	printf("\na=%d",a);

	// Value of a = 8 

	return 0;

}