Question

• Design, plan, test, and write a computer program in Java that asks the user to enter 1 number and a String. You will display the first n characters of the string where n is the number entered. For example, if the user enters 3 and java then you will print jav. If they enter 5 and Halloween then you print Hallo. If the user enters a number less than 0 then set the number to 0. Assume the user will not enter a number greater than the length of the string. Display the percentage of the word displayed. For 3 and Java, the percentage is 75%. For 5 and Halloween the percentage is 55.55555555555556%. No if, loops, arrays, classes or methods are needed. You will also need the String class to complete this problem.

Write the Java code for the program, the entire program can be written inside a main method.

Make sure the main method outputs your full name on screen.

Copy your code, with programmer comments, headers and place this into your MS Word document.

Follow Java Naming Conventions

Do not forget about importing java.util.Scanner, and using Scanner input = new Scanner(System.in); with input.nextLine(); and input.nextInt();

Update the test table with the actual outputs

inputs	Expected outputs	Actual outputs	Description

Sample Run

Enter a number:

3

Enter a String:

Java

Jav

You printed 75.0% of Java

Answer 1

import java.util.*;    
public class Main {    
     public static void main(String args[]){   
             Scanner input = new Scanner(System.in);  
             System.out.print("Enter a number : ");
             int n=input.nextInt();
             input.nextLine(); 
             System.out.print("Enter string\n");  
             String s = input.nextLine();  
        
             n=n<0?0:n;
                
                String s2=s.substring(0,n);
                System.out.print(s2);
                float per=((float)s2.length()/s.length())*100;
                System.out.println("\nYou printed "+per+"% of "+s);
        }
     }
          

Here is the code that asks the user to enter a number and then asks the user to enter a string and then rpitns the substring starting from index 0 to n value enter and the prints the percentage of the string printed compared to the original string.(I have used one extra input.nextLine() inorder to skip the new line and avoiding driectly termination of the string without entering.

SCREENSHOT OF THE OUTPUT :

YOU CAN WRITE YOU NAME IN System.out.println(" YOU NAME ") AT START OF THE PROGRAM.

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