Question

write a code that will print all numbers and their squares between 1 and a given positive integer

examples:

if a given integer is 7 then ouput is:

1 1

2 4

3 9

4 16

5 25

6 36

7 49

the full java code using repetition and BASIC JAVA language for beginners

Answer 1

Note: Class name and variable names are used in such a way for a better understanding. It can be changed according to the user's choice. Please refer to code snippets for a better understanding of indentation and comments. Please save the file name as the class name which contains the main function

Program code: sqr_num.java

import java.io.*;
import java.util.Scanner;

public class sqr_num
{
   public static void main(String[] args)
   {
       // scanner class
       Scanner inp_read = new Scanner(System.in);
      
       // variable to store input number
       // and counter variable
       int inp_num, ctr;
      
       // asking input integer i.e highest integer
       System.out.print("Input integer i.e the highest integer : ");
      
       // reading the upper limit from the user
       inp_num = inp_read.nextInt();
      
      
       // printing the squares using for loop
       for(ctr=1; ctr<=inp_num; ctr++)
       {
           System.out.print(ctr + ":" + ctr*ctr + "\n");
       }
      
   }

}

Code Snippet

Sample output runs