#2 Opertaor in C

➤Assignment operator  :-

This operator is used to assign the value in variable .

Example:-

A=10

B=10.5

Name=”COc”

➤Multiple assignment operator :-

This operator is used to assign same value in multiple variables.

Example:-

a = b = c = 10;

➤Compund assignment  :-

• Assignment  operator is used with arithmetic operator  and bitswise operator. This concept is called compound assignment operator.
• It is also known as shortcut assignment operator.

Example:-

a = a+10   can be written as  a+=10

a = a *30 can be written as  a*=30

➤Increment operartor (++)  :-

This operator is used to increase the value of variable by 1.

⏩Prefix increment :-

• Increment operator is used before operand. Eg:- ++a
• Value of variable is incremented first,then new value is used in operation .

⏩Postfix increment :-

• Increment operator is used after operand. Eg:- a++
• Value of variable is used in the operation first, then incremented

Evaluation of prefix and and postfix :

Prefix	Postfix
1.       a=10, b=20 ++a    a=11 ++b    b=21 a=11 b=21 2.       a=10, b=20 p=++a    a=11 q=++b    b=21 a=11 b=21 p=11 q=21 3.       a=10, b=20 ++a    a=11 ++b    b=21 p=++a   a=12 q=++b   b=22 a=12 b=22 p=12 q=22	1.       a=10, b=20 a++   a=10 b++   b=20 a=11 b=21 2.       a=10, b=20 p=a++   a=10 q=b++   b=20 a=11 b=21 p=10 q=20 3.       a=10, b=20 a++    a=10 b++    b=20 p=a++    a=11 q=b++    b=21 a=12 b=22 p=11 q=21

➤Decrement operator :-

This operator is used to decrease the value of variable by 1.

⏩Prefix decrement :-

• Decrement operator is used before operand. Eg:-  --a
• Value of variable is decremented first,then new value is used in operation .

⏩Postfix decrement :-

• Decrement operator is used after operand. Eg:-   a--
• Value of variable is used in the operation first, then decremented.

➤Comma operator :-

• This operator is used to separate multiple values within parenthesis sign “( )”.
• In this case last value will be evaluated and assigned in variable.

Case1:-

             a=(10,20,30,40);

      a=40

Case2:- 

               a=10,20,30,40;

       a=10

➤Sizeof operator :-

This operator return the size of data type and variable in byte.

Syntax:-

              sizeof(data type variable)

example:-

·         sizeof(int)    2byte  

·         sizeof(float)   4byte

·         int a; sizeof(a);  2byte

·         sizeof(‘A’)   1byte

·         sizeof(“coc”)   4byte