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floor(x as float) in Math Library Functions of Programming in CPP
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Usage  
Floor function is used to return largest integer value which is greater than x value.
Syntax  
floor(number);
Example  
#include <stdio.h>     
#include <math.h>      
int main ()
{
  printf ( "Floor of 5.9 is ", floor(5.9) );
  printf ( "Floor of -7.3 is ", floor(-7.3) );
  return 0;
}
Output 
Floor of 5.9 is 5
Floor of -7.3 is -8
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