Find Positive-Negative Program In C


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Like finding a number is even or odd, finding a number positive or negative is also very simple program to write. We shall learn the use of conditional statement if-else in C.

Algorithm

Algorithm of this program is very easy −

START
   Step 1 → Take integer variable A
   Step 2 → Assign value to the variable
   Step 3 → Check if A is greater than or equal to 0  
   Step 4 → If true print A is positive
   Step 5 → If false print A is negative
STOP

Flow Diagram

We can draw a flow diagram for this program as given below −

FlowDiagram Positive or Negative

Pseudocode

procedure positive_negative()

   IF ( number ≥ 0 )
      PRINT number is positive
   ELSE
      PRINT number is negative
   END IF

end procedure

Implementation

Implementation of this algorithm is given below −

#include <stdio.h>

int main() {
   int number = -2;
   
   if (number >= 0)
      printf("%d is positive\n", number);
   else
      printf("%d is negative\n", number);
   
   return 0;
}

Output

Output of the program should be −

-2 is negative
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