I don't understand this code. plz Explain this code in simple words?

Question

public class Main

{

public static int sumfirstandlastdigit(int number)

{

int number1 = number;

int sum = 0;

if(number < 0)

{

return -1;

}

int lastdigit = number % 10;

while(number1 != 0)

{

int firstdigit = number1 / 10;

firstdigit = number1;

number1 /= 10;

sum = firstdigit +lastdigit;

}

return sum;

}

public static void main(String args[])

{

System.out.println(sumfirstandlastdigit(325));

}

}

Answer 1

Thank u