text: #include <stdio.h>
  #include <stdlib.h>
  
  int main()
  {
      float num ;
      printf("enter a number to check whether is a positive or negative : ");
      scanf("%f",&num) ;
      if (num >0 )
          printf("this number is positive ");
      else if (num < 0)
          printf("this number is negative ");
      else
          printf("this number is zero ");
      return 0;
  }
  