Thursday, September 3, 2015

Operators in C Language(MCA I)

C Programming Operators :


4.1
4.2
Operator
Meaning
Example
+
Addition Operator
160 + 20 = 180
-
Subtraction Operator
60 – 10 = 50
*
Multiplication Operator
20 * 4 = 80
/
Division Operator
20 / 5 = 4
%
Modulo Operator
20 % 7 = 6
In C Programming , Unary operators are having higher priority than the other operators. Unary Operators are executed before the execution of the other operators. Increment and Decrement are the examples of the Unary operator in C.
4.3
1.      Increment operator is used to increment the current value of variable by adding integer 1.
2.     Increment operator can be applied to only variables.
3.     Increment operator is denoted by ++.

A. Pre Increment Operator

Pre-increment operator is used to increment the value of variable before using in the expression. In the Pre-Increment value is first incremented and then used inside the expression.
b = ++y;
In this example suppose the value of variable ‘y’ is 5 then value of variable ‘b’ will be 6 because the value of ‘y’ gets modified before using it in a expression.

B. Post Increment Operator

Post-increment operator is used to increment the value of variable as soon as after executing expression completely in which post increment is used. In the Post-Increment value is first used in a expression and then incremented.
b = x++;
In this example suppose the value of variable ‘x’ is 5 then value of variable ‘b’ will be 5 because old value of ‘x’ is used.
4.4
We have seen increment operator in C Programming which increments the value of the variable by 1. Similarly C Supports one more unary operator i.e decrement operator which behaves like increment operator but only difference is that it decreases the value of variable by 1.
4.5
Operator
Meaning
> 
Greater than
>=
Greater than or equal to
<=
Less than or equal to
< 
Less than
4.6
Whenever we use if statement then we can use relational operator which tells us the result of the comparison, so if we want to compare more than one conditions then we need to use logical operators. Suppose we need to execute certain block of code if and only if two conditions are satisfied then we can use Logical Operator in C Programming.
Operator
Name of the Operator
&&
And Operator
||
Or Operator
!
Not Operator


4.8

Conditional Operators [ ?: ] : Ternary Operator Statement in C

1.      They are also called as Ternary Operator .
2.     They also called as ?: operator
3.     Ternary Operators takes on 3 Arguments

Syntax :

expression 1 ? expression 2 : expression 3
where
·         expression1 is Condition
·         expression2 is Statement Followed if Condition is True
·         expression2 is Statement Followed if Condition is False










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