C – Logical Operators

Logical Operators:

• These operators return true (1) or false (0) by evaluating more than one expression.
• Operators are,
  • Logical-AND (&&)
  • Logical-OR (||)
  • Logical-NOT (!)
• Following truth table represents the results of Logical operators’ evaluation

A	B	A&&B	A||B	!A	!B
T	T	T	T	F	F
T	F	F	T	F	T
F	T	F	T	T	F
F	F	F	F	T	T

#include <stdio.h>
int main()
{
	printf("5>3 && 5!=3 = %d \n", 5>3 && 5!=3);
	printf("5>3 && 5==3 = %d \n", 5>3 && 5==3);
	printf("5>3 || 5==3 = %d \n", 5>3 || 5==3);
	printf("5<3 || 5==3 = %d \n", 5<3 || 5==3);
	return 0;
}

Condition to check the number divisible by 3 and 5

N%3==0 && N%5==0

Condition to check First Num is greater than both Second & Third Nums

A>B && A>C

Condition to check the number divisible by 3 but not with 5

N%3==0 && N%5!=0

Condition to check the number is in between 30 and 50

N>=30 && N<=50

Condition to check the number is 3 digits number

N>=100 && N<=999

Condition to check the student passed in all 5 subjects

M1>=35 && M2>=35 && M3>=35 && M4>=35 && M5>=35

Condition to check the character is Vowel

CH==’A’ || CH==’E’ || CH==’I’ || CH==’O’ || CH==’U’

Condition to check the character is Upper case alphabet

CH>=’A’ && CH<=’Z’

Condition to check the character is digit

CH>=’0’ && CH<=’9’

Condition to check the character is Alphabet

(CH>=’A’ && CH<=’Z’) || (CH>=’a’ && CH<=’z’)

Condition to check the character is Symbol

!((CH>=’A’ && CH<=’Z’) || (CH>=’a’ && CH<=’z’)||( CH>=’0’ && CH<=’9’))

Condition to check the 3 numbers equal

A==B && B==C && C==A

Condition to check any 2 numbers equal or not among the 3 numbers

A==B || B==C || C==A

Condition to check the 3 numbers are unique

A!=B && B!=C && C!=A