floor()

The floor function returns the largest integer that is smaller than or equal to x (ie: rounds downs the nearest integer).
 

Sample Program:

#include<stdio.h> 

#include<math.h> 

 

main() 

{ 

 

double number, result; 

printf("Enter a number to round it down "); 

 

scanf("%lf",&number); 

result = floor(number); 

printf("Original number = %lf\n", number); 

printf("Number rounded down = %lf", result); 

 

return 0; 

 

}

Output:

Enter a number to round it down -2.3
Original number = -2.300000
Number rounded down = -3.000000