JAVA
Ask the user for integers. If the user did not enter an integer, ask again. (Type Safe Input) Keep a running total of the intergers entered (sum). Once the user enters 0, stop looping. Print the sum of all the numbers. Do not use try-catch.
EXAMPLE OUTPUT:
Enter an integer, 0 to stop> [fasdfsa]
Invalid input.
Enter an integer, 0 to stop> [231.342]
Invalid input.
Enter an integer, 0 to stop> [1]
Enter an integer, 0 to stop> [2]
Enter an integer, 0 to stop> [3]
Enter an integer, 0 to stop> [0]
The sum is: 6
import java.util.Scanner; public class ValidIntegers { public static void main(String[] args) { Scanner scan = new Scanner(System.in); int n = 1, sum = 0; String s; boolean f; while (n!=0) { System.out.print("Enter an integer, 0 to stop> "); s = scan.nextLine(); f = false; for(int i = 0;i<s.length();i++){ if(!(s.charAt(i)>='0' && s.charAt(i)<='9')){ f = true; } } if(f){ System.out.println("Invalid input."); } else { n = Integer.parseInt(s); sum += n; } } System.out.println("The sum is: "+sum); } }
JAVA Ask the user for integers. If the user did not enter an integer, ask again....
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