Thread: Exercise i have been stuck on for several days now

Hello java community,
i am new to the forum and i got an exercise like a week ago.
the exercise is:
Write a program that recieves an positive integer from the user and print the biggest diggit for that integer.

the problem i face with is that i have to use "For" loop in order to solve it which get me stucked.

the program i wrote is:


import java.util.Scanner;
public class name{

public static void main(String[] args) {
Scanner kb = new Scanner(System.in);
System.out.print("Enter positive integer:");
int num=kb.nextInt();

for (int maxDigit = 0; num % 10 >= maxDigit ; maxDigit = num )
{
System.out.println("The biggest digit in "+num+ " is " +maxDigit);

}

kb.close();

}
}

that's after alot of changes and i don't know what to do from now.
Thanks!

I believe the issue is your for loop condition.

Example: user enters 7
First iteration, 7 % 10 >= 0, maxDigit = 7
Second iteration, 7 % 10 >= 7, maxDigit = 7 (you enter an infinite loop)

String n = String.valueOf(new Random().nextInt(262144));
log.info("The number is: {}", n);
int max = Integer.valueOf(String.valueOf(n.charAt(0)));
for(int i=0; i<n.length(); i++){
int c = Integer.valueOf(String.valueOf(n.charAt(i)));
if(c > max){
max = c;
}
}
log.info("Max: {}", max);