Assignment and shorthand assignment operator in c

Assignment and shorthand operator in C

By Ahmad Irshad | C Programming Tutorial > Assignment & shorthand operaotr in C

In C programming, assignment operator = is used to assign value to an variable. For Example: If the vlaue 10 is to be assigned for the variable x it can be assigned as x = 10 

Assignment operator always assign value of its right operand to left operand. That is, x = y which assign the value of y to x. Assignment operator is denoted by = (equal to) sign. It is a binary operator. 

Let's see the the below assignment table:

Operation	Description
x = 10	Assigns 10 to variable x
y = (5 + 4) / 2	Evaluates expression (5+4)/2 and assign result to y
z = x + y	Evaluates x + y and assign result to z
5 = x	Error, you cannot re-assign a value to a constant
10 = 10	Error, you cannot re-assign a value to a constant

Remember: The RHS of assignment operator must be a constant, expression or variable. Whereas LHS must be a variable.

Shorthand assignment operator:

C Provides some special shorthand assignment operators, also known as compound assignment operators. It's called shorthand because it provides a short way to assign an expression to a variable. this operator can be used to connect Arithmetic or Bitwise operators with an Assignment operator. 

For Example: Expressiona = a + 5; can also be written in short a += 5;

Similarly, there are many shorthand assignment operators. Below is a list of shorthand assignment operators in C.

Shorthand assignment operator	Example	Meaning
+=	a += 10	a = a + 10
-=	a -= 10	a = a - 10
*=	a *= 10	a = a * 10
/=	a /= 10	a = a / 10
%=	a %= 10	a = a % 10
&=	a &= 10	a = a & 10
|=	a |= 10	a = a | 10
^=	a ^= 10	a = a ^ 10
~=	a ~= 10	a = a ~ 10
<<=	a <<= 10	a = a << 10
>>=	a >>= 10	a = a >> 10

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