The input number can be negative. The absolute value of consists of a single digit. In other words, the inequality -9 \le n \le 9 must hold.
Algorithm implementation
Read the input value of .
scanf("%d", &n);Print the answer.
if (n > -10 && n < 10) puts("Ok");
else puts("No");Java implementation
import java.util.*;
public class Main
{
public static void main(String[] args)
{
Scanner con = new Scanner(System.in);
int n = con.nextInt();
if (n > -10 && n < 10) System.out.println("Ok");
else System.out.println("No");
con.close();
}
}Python implementation
Read the input value of .
n = int(input())Print the answer.
if n > -10 and n < 10: print("Ok")
else: print("No")Python implementation — 2
Read the input value of .
n = int(input())Print the answer.
if -10 < n < 10: print("Ok")
else: print("No")