Java Output Formatting | Hackerrank Problem Solutions

Java System.out.printf function are often wont to print formatted output. the aim of this exercise is to check your understanding of formatting output using printf.

To get you started, some of the answer is provided for you within the editor; you want to format and print the input to finish the answer .

Input Format

Every line of input will contain a String followed by an integer.
Each String will have a maximum of  alphabetic characters, and each integer will be in the inclusive range from  to .

Output Format

In each line of output there should be two columns:
The first column contains the String and is left justified using exactly  characters.
The second column contains the integer, expressed in exactly  digits; if the original input has less than three digits, you must pad your output's leading digits with zeroes.

Sample Input

java 100
cpp 65
python 50
Sample Output

================================
java           100
cpp            065
python         050
================================
Explanation

Each String is left-justified with trailing whitespace through the first  characters. The leading digit of the integer is the  character, and each integer that was less than  digits now has leading zeroes.










First we have to write System.out.format statement in the place of System.out.println which is used to format format the output. Therefore our code will be look like  –> System.out.format();
Next we have to use Modulus (%) format specifier in between double quote. And our code will be –> System.out.format(“% “);
Next we have to use ‘-‘ a flag for left-justified alignment after modulus which will instruct the compiler that it will be left indent, if you want to use right indent do not use “-“. So our code will be –> System.out.format(“%- “);

The length of the string must be 15 as our problem requirement. So our code will be –> System.out.format(“%-15”);
s(format values as a string) will be substituted by our String. This will mark the end of first requirement. So our code will be –> System.out.format(“%-15s”);
Now the second part of the question. again we have to use modulus( % ) format specifier and put 3d in order to  format integer. As per our question requirement and integer length must be 3 . So our code will be –> System.out.format(“%-15s=”);
%n will help to go to the next line
\

import java.util.Scanner;

public class p1 {

    public static void main(String[] args) {
       
    Scanner sc=new Scanner(System.in);
        String s1 = null;
        int x = 0;
    System.out.println("=========================");
    for(int i=0;i<3;i++)
    {
   
    s1=sc.next();
    x=sc.nextInt();
    System.out.format("%-15s%03d%n", s1, x);
    }
       
    }
}