floor (math function) in C.

 

01  #include <math.h>
02 #include <stdio.h>
03
04 int main()
05 {
06 double num = 123.54;
07 double down_value;
08
09 down_value = floor(num);
10
11 printf("original number %5.2lfn", num);
12 printf("number rounded down %5.2lfn", down_value);
13
14 return 0;
15 }
 
 
OUTPUT :

original number 123.54
number rounded down 123.00

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