'while' infinite loop using scanner input and pos/neg numbers

simonshampoo :

I can't seem to understand how to use a while loop to determine whether a number is positive or not. While (I > 0), if I put any positive number, it will always result above 0 meaning there's an infinite loop.

int i = 0;

System.out.println("#1\n Input Validation\n Positive values only"); // #1 Input Validation
System.out.print(" Please enter a value: ");

Scanner scan = new Scanner(System.in);
i = scan.nextInt();

while (i > 0)
{
    System.out.println("The value is: " +i);
} 

System.out.println("Sorry. Only positive values.");

Also, when I input a negative number, it doesn't go back to the scanner to possibly input a positive number.

Anuradha :

You can go to this kind of approach:

    int i = 0;

    System.out.println("#1\n Input Validation\n Positive values only"); // #1 Input Validation

    Scanner scan = new Scanner(System.in);

    while (i >= 0) {
        System.out.print(" Please enter a value: ");
        i = scan.nextInt();
        if (i > 0) {
            System.out.println("The value is: " + i);
        } else {
            break;
        }
    }

    System.out.println("Sorry. Only positive values.");

Guess you like

Origin http://10.200.1.11:23101/article/api/json?id=415455&siteId=1

'while' infinite loop using scanner input and pos/neg numbers

python-while loop (infinite)

while loop structure _ infinite loop processing

Python for loop (finite loop) and while loop (infinite loop)

python while an infinite loop 200,308

Precautions for while infinite loop in socket programming

After running the DO WHILE loop, scanner is not working

Python user input and while loop

While loop skips user input

Several ways of finding the accumulation result of even numbers within 1-100 by using while loop

Use Scanner in an endless loop keyboard input

python 5 and a user input while loop

Python user input & while loop beginner notes

1. Input while loop 123456 ... 8910

do while loop and user input issue

Basic knowledge of Python -- user input and while loop

[shell articles] process control. if judgment, case statement, for loop, while loop, until loop, infinite loop, jump out of loop, break, continue,

Lesson 2, using python while loop

how to acces arguments using while loop in java

Do - while loop with conditions using Char (Java)

An issue in using while loop with multiple conditions

Using WHILE loop statement in MySQL stored procedure

Infinite loop and nested loop

Infinite loop (endless loop)

bootstrap table: JQuery in each method to bind blur event listener input input legality, into an infinite loop

C/c++ input stream refresh to solve the infinite loop problem caused by illegal input

User input -Scanner scanner

Python learning path 6 - user input and while loop

Python for loop to write an infinite loop?

Java infinite loop, loop nesting