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Explain the concept of logical and assignment operator in C language
First, let us learn about the logical operator.
Logical operator
These are used to combine 2 (or) more expressions logically.
They are logical AND (&&) logical OR ( || ) and logical NOT (!)
Logical AND (&&)
exp1 | exp2 | exp1&&exp2 |
---|---|---|
T | T | T |
T | F | F |
F | T | F |
F | F | F |
Logical OR(||)
exp1 | exp2 | exp1||exp2 |
---|---|---|
T | T | T |
T | F | T |
F | T | T |
F | F | F |
Logical NOT(!)
exp | !exp |
---|---|
T | T |
F | T |
Operator | Description | Example | a=10,b=20,c=30 | Output |
---|---|---|---|---|
&& | logical AND | (a>b)&&(a<c) | (10>20)&&(10<30) | 0 |
|| | logical OR | (a>b)||(a<=c) | (10>20)||(10<30) | 1 |
! | logical NOT | !(a>b) | !(10>20) | 1 |
Example
Following is the C program to compute logical operators −
#include<stdio.h> main (){ float a=0.5,b=0.3,c=0.7; printf("%d
",(a<b)&&(b>c));//0// printf("%d
",(a>=b)&&(b<=c));//1// printf("%d
",(a==b)||(b==c));//0// printf("%d
",(b>=a)||(a==c));//0// printf("%d
",(b<=c)&&!(c>=a));//0// printf("%d
",!(b<=c)||(c>=a));//1// }
Output
You will see the following output −
0 1 0 0 0 1
Assignment Operator
It is used to assign a value to a variable.
Types
The types of assignment operators are −
- Simple assignment
- Compound assignment
Operator | Description | Example |
---|---|---|
= | simple assignment | a=10 |
+=,-=,*=,/=,%= | compound assignment | a+=10"a=a+10 a=10"a=a-10 |
Program
Given below is the C program for compound assignment operator −
#include<stdio.h> int main(void){ int i; char a='h'; printf("enter the value of i:
"); scanf("%d",&i); printf("print ASCII value of %c is %d
", a, a); a += 5; printf("print ASCII value of %c is %d
", a, a); a *= a + i; printf("a = %d
", a); a *= 3; printf("a = %d
", a); a /= 2; printf("a = %d
", a); a %= 4; printf("a = %d
", a); return 0; }
Output
You will see the following output −
enter the value of i: 3 print ASCII value of h is 104 print ASCII value of m is 109 a = -80 a = 16 a = 8 a = 0
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