Print two lines formatted under each other

Question

I'm trying to format the output of a multiplication table where you can only have 5 numbers/integers on one line. I'm trying this using a printf method in a for loop but it's not working so far.

Code:

System.out.println("Which multiplication table do you want to print?: ");
int number = input.nextInt();
int calculation;
System.out.println("Multiplication table: " + number + ":");
for (int i = 1; i <= 10; i++ ) {
    calculation = number * i;
    System.out.printf("%-5s ", calculation);
}

My output:

3    6    9    12   15   18   21   24   27   30

Output I'm trying to get:

 3    6    9    12   15
 18   21   24   27   30

score 2 · Answer 1 · answered Sep 27 '18 at 08:55

2

Print a line breaker every 5 number:

calculation = number * i;
System.out.printf("%-5s ", calculation);
if (i % 5 == 0) {
   System.out.println();
}

answered Sep 27 '18 at 08:55

xingbin

27,410
9
53
103

score 1 · Answer 2 · answered Sep 27 '18 at 08:55

1

Print a newline after printing 5 elements:

if(i % 5 == 0)
   System.out.println();

answered Sep 27 '18 at 08:55

Mushif Ali Nawaz

3,707
3
18
31

score 1 · Accepted Answer · answered Sep 27 '18 at 09:00

1

I think you have multiple options to achieve this: 1. Print a new empty line after the 5th iteraiton 2. Add "\n" to mark end of line

1.

for (int i = 1; i <= 10; i++ ) {
        calculation = number * i;
        if (i % 5 == 0) {
         System.out.println();
        }    
        System.out.printf("%-5s ", calculation);
}

2.

for (int i = 1; i <= 10; i++ ) {
        calculation = number * i;
        if (i % 5 == 0) {
         System.out.printf("\n");
        }    
        System.out.printf("%-5s ", calculation);
}

Hope this helps

answered Sep 27 '18 at 09:00

JWiryo

371
4
11

One more question, what exactly is the "%" operator used for and when is it used for most of the time(examples please)? – Configuration Sep 27 '18 at 12:55
Ah, sorry for not explaining that. % is a _modulus_ operator in Java or modulo in Python (if im not mistaken) but they are exactly the same thing. Essentially, it is a division operation but instead of returning the _quotient_ value it returns the remainder. ` x % 5 == 0 ` is an expression to check whether x is completely divisible by 5 as the remainder of that division operation is 0. This is explained well here https://stackoverflow.com/questions/17524673/understanding-the-modulus-operator Hope this helps – JWiryo Sep 28 '18 at 02:56

Print two lines formatted under each other

3 Answers3