8-C Boolean.md

C Booleans and Comparison Operator

Video Link: https://youtu.be/TybmJxXRV80 Tutorial Link: https://www.programiz.com/c-programming

C Booleans

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value1 = true;
  bool value2 = false;
  
  printf("%d ", value1);
  printf(" %d", value2);

  return 0;
}

Output

1 0

Comparison Operator

>   Greater than
<   Less than
==  Equal to
>=  Greater than or equal to
<=  Less than or equal to
!=  Not equal to

Greater Than Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (12 > 9);
  
  printf("%d ", value);

  return 0;
}

Output

1

Change value from 12 to 9

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (5 > 9);
  
  printf("%d ", value);

  return 0;
}

Output

0

Less than Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (5 < 9);
  
  printf("%d ", value);

  return 0;
}

Output

1

Change value from 5 to 9

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (9 < 9);
  
  printf("%d ", value);

  return 0;
}

Output

0

Equal to Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (9 == 9);
  
  printf("%d ", value);

  return 0;
}

Output

1

Change value from 9 to 6

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (9 == 6);
  
  printf("%d ", value);

  return 0;
}

Output

0

Not Equal to Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (9 != 6);
  
  printf("%d ", value);

  return 0;
}

Output

1

Greater Than or Equal To Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (9 >= 6);
  
  printf("%d ", value);

  return 0;
}

Output

1

Less Than or Equal To Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (9 <= 6);
  
  printf("%d ", value);

  return 0;
}

Output

0

Comparator operators with floating point numbers

#include <stdio.h>
#include <stdbool.h>

int main() {

  bool value = (9.34 <= 6.87);
  
  printf("%d ", value);

  return 0;
}

Output

0

Comparison between variables

#include <stdio.h>
#include <stdbool.h>

int main() {

  int num1 = 9;
  int num2 = 6;

  bool value = num1 > num2;
  
  printf("%d ", value);

  return 0;
}

Output

1

Comparison operators with a variable and value

#include <stdio.h>
#include <stdbool.h>

int main() {

  int num1 = 9;

  bool value = num1 > 6;
  
  printf("%d ", value);

  return 0;
}

Output

1

Logical Operators in C

&&	Logical AND
||	Logical OR
!	Logical Not

AND Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  int age = 18;
  double height = 6.3;
 
  bool result = (age >= 18) && (height > 6.0);
  
  printf("%d ", );

  return 0;
}

Output

1

Change the value of age to 16

#include <stdio.h>
#include <stdbool.h>

int main() {

  int age = 16;
  double height = 6.3;
 
  bool result = (age >= 18) && (height > 6.0);
  
  printf("%d ", );

  return 0;
}

Output

0

OR Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  int age = 16;
  double height = 6.3;
 
  bool value = (age >= 18) || (height > 6.0);
  
  printf("%d ", value);

  return 0;
}

Output

1

NOT Operator

#include <stdio.h>
#include <stdbool.h>

int main() {

  int age = 16;
 
  bool value = !(age >= 18);
  
  printf("%d ", value);

  return 0;
}

Output

1

Change the operator >= to <=

#include <stdio.h>
#include <stdbool.h>

int main() {

  int age = 16;
 
  bool value = !(age <= 18);
  
  printf("%d ", value);

  return 0;
}

Output

0

---

Programiz Quiz

Q. Which of the following code returns false?

Options:

1. 9 >= 9
2. 9 > 9
3. 9 <= 9
4. 9 == 9

Answer: 2