Operator
This is a symbol use to perform some operation on variables, operands or with the constant. Some operator required 2 operand to perform operation or Some required single operation.
Several operators are there those are, arithmetic operator, assignment, increment , decrement, logical, conditional, comma, size of , bitwise and others.
1. Arithmetic Operator
This operator used for numeric calculation. These are of either Unary arithmetic
operator, Binary arithmetic operator. Where Unary arithmetic operator required only one operand such as +,-, ++, --,!, tiled. And these operators are addition,
subtraction, multiplication, division. Binary arithmetic operator on other hand
required two operand and its operators are +(addition), -(subtraction),
*(multiplication), /(division), %(modulus). But modulus cannot applied with
floating point operand as well as there are no exponent operator in c.
Unary (+) and Unary (-) is different from addition and subtraction.
When both the operand are integer then it is called integer arithmetic and the result
is always integer. When both the operand are floating point then it is called floating
arithmetic and when operand is of integer and floating point then it is called mix
type or mixed mode arithmetic . And the result is in float type.
2.Assignment Operator
A value can be stored in a variable with the use of assignment operator. The
assignment operator(=) is used in assignment statement and assignment expression.
Operand on the left hand side should be variable and the operand on the right hand
side should be variable or constant or any expression. When variable on the left
hand side is occur on the right hand side then we can avoid by writing the
compound statement.
For example,
int x= y;
int Sum=x+y+z;
3.Increment and Decrement
The Unary operator ++, --, is used as increment and decrement which acts upon
single operand. Increment operator increases the value of variable by one
.Similarly decrement operator decrease the value of the variable by one. And these
operator can only used with the variable, but cann't use with expression and
constant as ++6 or ++(x+y+z).
It again categories into prefix post fix . In the prefix the value of the variable is
incremented 1st, then the new value is used, where as in postfix the operator is
written after the operand(such as m++,m--).
EXAMPLE
let y=12;
z= ++y;
y= y+1;
z= y;
Similarly in the postfix increment and decrement operator is used in the operation .
And then increment and decrement is perform.
EXAMPLE
let x= 5;
y= x++;
y=x;
x= x+1;
