Question

Write a program to accept a mumber and check if it is a three-digit mamber or not. it is a three-digit mumber, print the maximum digit of the given number using Math class method otherwise print it is not a three-digit number. For example, if the user enters 2345, the output should be "It is not a three-digit number". Sample Input Enter a number 455 Sample Output The maximum digit in the given number is: 8​

Answer 1

Question:-

Write a program to accept a number and check if it is a three-digit number or not. it is a three-digit number, print the maximum digit of the given number using Math class method otherwise print it is not a three-digit number.

Code:-

class x

{

public static void main(int num)

{

if(num/100<=9)

{

System.out.println("Number is a three digit number. ");

int max=0;

int a[]=new int[3], i=0;

for(;num!=0;num/=10, i++)

a[i]=num%10;

max=Math.max(a[0], Math.max(a[1]), Math.max(a[2]));

System.out.println("Largest digit is: "+max);

}

else

System.out.println("Number is not a three digit number.");

}

}

Explanation:-

Consider a number, say num=999

num/100=9 which is less than or equal to 9. So, it is a three digit number.

Consider, num=544, num/100=5 and 5<=9 is true. So, it is also a three digit number.

Again, if num=1000, num/100=10 which is greater than 9, so it is not a three digit number. In this way, we have checked whether it is a three digit number or not. Now, we will assign each digit of the number in an array and from that, we will calculate the largest digit using Math.max() function.