Question

write a program to input 3 numbers and print sum of squares of the number?​

Answer 1

Answer:

The sum of squares of the first n natural numbers is found by adding up all the squares.

Input - 5

Output - 55

Explanation - 12 + 22 + 32 + 42 + 52

There are two methods to find the Sum of squares of first n natural numbers −

Using Loops − the code loops through the digits until n and find their square, then add this to a sum variable that outputs the sum.

Example

#include <iostream> using namespace std; int main() {    int n = 5;    int sum = 0;    for (int i = 1; i >= n; i++)       sum += (i * i);    cout <<"The sum of squares of first "<<n<<" natural numbers is "<<sum;    return 0;

Explanation:

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Answer 2

★$\bf{\underline{Java::}}$

import java.util.Scanner; // Line 1

public  class Main { // Line 2

  public static void main(String [] args) { // Line 3

     Scanner sc = new Scanner(System.in); // Line 4

     System.out.print("Enter the three numbers"); // Line 5

     int num1 = sc.nextInt(); // Line 6

     int num2 = sc.nextInt(); // Line 7

     int num3 = sc.nextInt(); // Line 8

     int sum = Math.pow(num1, 2) + Math.pow(num2, 2) + Math.pow(num3, 2); // Line 9

     System.out.println("The sum is " + sum); // Line 10

  } // Line 11

} // Line 12

★$\bf{\underline{Explanation::}}$

❖ Line 1: This line imports the Scanner class from the java.util package, which is used to read input from the user.

❖ Line 2: This line defines a public class called Main.

❖ Line 3: This line defines the main method of the program, which is the entry point for the program's execution.

❖ Line 4: This line creates a new Scanner object called sc that reads input from the standard input stream.

❖ Line 5: This line prints the message "Enter the three numbers" to the console.

❖ Line 6: This line reads an integer input from the user using the nextInt() method of the Scanner object and assigns it to the variable num1.

❖ Line 7: This line reads another integer input from the user using the nextInt() method of the Scanner object and assigns it to the variable num2.

❖ Line 8: This line reads a third integer input from the user using the nextInt() method of the Scanner object and assigns it to the variable num3.

❖ Line 9: This line calculates the sum of the squares of the three numbers using the Math.pow() method, which is used to raise each number to the power of 2 (i.e. to square each number), and then adds them together. The result is stored in the variable sum.

❖ Line 10: This line prints the message "The sum is " followed by the value of the sum variable to the console.

❖ Line 11: This line marks the end of the main method.

❖ Line 12: This line marks the end of the class.