Integer

Algorithm Analysis

A number n is integer if its whole part is equal to itself. That is, the following equality holds: $floor (n) = n$ .

Algorithm Implementation

Read a real number n.

scanf("%lf", &n);

Compare the number n with its whole part. If these values are equal, then the number n is an integer.

if (floor(n) == n) puts("Ok");
else puts("No");

Java implementation

import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner con = new Scanner(System.in);
        double n = con.nextDouble();
        if (Math.floor(n) == n)
            System.out.println("Ok");
        else
            System.out.println("No");
        con.close();
    }
}

Python implementation

import math
n = float(input())
if math.floor(n) == n: print("Ok")
else: print("No")