CODEWITHSUNDEEP
java
Brendon Baughn
Brendon Baughn

Reputation: 150

Input variable not being reset with each iteration

In my code, I am testing palidromes, but my input variable is not being reset with each iteration. The test works perfectly the first time, but with the same input, it comes out wrong.

Scanner input = new Scanner(System.in);
int i;
System.out.print("Enter a string: ");
String pal = input.nextLine();
String reverse = "";
boolean isFalse = false;

while (!isFalse) {
    if (pal.isEmpty()) {
        System.out.println("Empty line read - Goodbye!");
        isFalse = true;
    }
    if (pal.length() > 0) {
        for (i = pal.length() - 1; i >= 0; --i) {
            reverse = reverse + pal.charAt(i);
        }
        if (pal.equals(reverse)) {
            System.out.println(pal + " is a palidrome");
            System.out.println();
        } else {
            System.out.println(pal + " is not a palidrome");
            System.out.println();
        }
        System.out.print("Enter a string: ");
        pal = input.nextLine();
    }
}

pal is the input variable. While debugging, I printed the results of pal. 1331 comes out as a palidrome, but as I reentered 1331, the program outputs a false statement. Any suggestions? Edit: I added the rest of the code above the while loop

Upvotes: 0

Views: 96

Answers (1)

Hülya
Hülya

Reputation: 3433

You should reset variable reverse by writing reverse = ""; before the for loop: 

reverse = "";
for (i = pal.length() - 1; i >= 0; --i) {
    reverse += pal.charAt(i);
}

Upvotes: 3

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