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 −

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 −

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 −

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

Bhanu Priya

Published on 10-Mar-2021 10:33:23

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