Explain the concept of logical and assignment operator in C language

CServer Side ProgrammingProgramming

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 (&&)

exp1exp2exp1&&exp2
TTT
TFF
FTF
FFF


Logical OR(||)

exp1exp2exp1||exp2
TTT
TFT
FTT
FFF


Logical NOT(!)

exp!exp
TT
FT


OperatorDescriptionExamplea=10,b=20,c=30Output
&&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 −

 Live Demo

#include<stdio.h>
main (){
   float a=0.5,b=0.3,c=0.7;
   printf("%d\n",(a<b)&&(b>c));//0//
   printf("%d\n",(a>=b)&&(b<=c));//1//
   printf("%d\n",(a==b)||(b==c));//0//
   printf("%d\n",(b>=a)||(a==c));//0//
   printf("%d\n",(b<=c)&&!(c>=a));//0//
   printf("%d\n",!(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
OperatorDescriptionExample
=simple assignmenta=10
+=,-=,*=,/=,%=compound assignmenta+=10"a=a+10
a=10"a=a-10

Program

Given below is the C program for compound assignment operator −

 Live Demo

#include<stdio.h>
int main(void){
   int i;
   char a='h';
   printf("enter the value of i:\n");
   scanf("%d",&i);
   printf("print ASCII value of %c is %d\n", a, a);
   a += 5;
   printf("print ASCII value of %c is %d\n", a, a);
   a *= a + i;
   printf("a = %d\n", a);
   a *= 3;
   printf("a = %d\n", a);
   a /= 2;
   printf("a = %d\n", a);
   a %= 4;
   printf("a = %d\n", 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
raja
Published on 10-Mar-2021 10:33:23
Advertisements