How can I make the program to perform a new or repeat the operation or ask the user to input again a number and know the factorial of it.
import java.util.Scanner;
public class Loops {
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
int num, num2 = 1, x, i;
System.out.println("-------------Factorial Calculator-------------");
System.out.print("Enter a positive integer: ");
num = input.nextInt();
if (num > 0) {
System.out.print(num + "! = ");
for (i = 1; i <= num; i++) {
if(i < num){
System.out.print(i + " x ");
num2 = num2 * i;
}
if(i == num){
System.out.print(i);
num2 = num2 * i;
System.out.println("\nThe factorial of " + num + " is " + num2);
System.out.println();
}
}
}else if (num < 0) {
System.out.println("Please input a valid integer. Program stopped.");
}
}
}
Put the code that computes the factorial in a separate method and call it from within a loop in main().
import java.util.Scanner;
public class Loops {
public static void printFactorial(int num) {
int i = 0;
int num2 = 0;
if (num > 0) {
System.out.print(num + "! = ");
for (i = 1; i <= num; i++) {
if(i < num){
System.out.print(i + " x ");
num2 = num2 * i;
}
if(i == num){
System.out.print(i);
num2 = num2 * i;
System.out.println("\nThe factorial of " + num + " is " + num2);
System.out.println();
}
}
}else if (num < 0) {
System.out.println("Please input a valid integer. Program stopped.");
System.exit(0);
}
}
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
int num = 0;
System.out.println("-------------Factorial Calculator-------------");
while ( true ) {
System.out.print("Enter a positive integer: ");
num = input.nextInt();
printFactorial(num);
}
}
}