CODEWITHSUNDEEP
javanested-loops
user2913362
user2913362

Reputation: 29

Nested for-loop in Java giving an error

I'm in a beginner class and my output should look like

25 20 15
26 21 16
27 22 17
28 23 18

This is my loop:

    for (int i = 25; i <= 28; i++){
        for (int a = i; a <= i-10; a -=5);{
            System.out.print(a);
        }
    System.out.println("");
    }

I can't figure out what's wrong with it, but it gives me an error message. Am I doing it right? Nested loops are really difficult for me...

Upvotes: 1

Views: 259

Answers (3)

Dawood ibn Kareem
Dawood ibn Kareem

Reputation: 79875

You need a >= i - 10 in the middle of the second loop, not <=. Also, remove that extra semicolon.

Upvotes: 0

libik
libik

Reputation: 23049

You have semicolon at the end of for cycle

for (int a = i; a <= i-10; a -=5);

Just remove it and here you go :

for (int a = i; a <= i-10; a -=5)

Also it is not fully functional, this code do output you want :

public static void main(String[] args) {
    for (int i = 25; i <= 28; i++) {
        for (int j = 0; j < 3; j++) {
            System.out.print((i - j*5) +" ");
        }
        System.out.println("");
    }
}

Upvotes: 0

rgettman
rgettman

Reputation: 178313

Remove the semicolon on this line:

for (int a = i; a <= i-10; a -=5);{

Java thinks that the semicolon is the body of the loop. Then a in the next block is out of scope, giving an error.

Additionally, the condition looks wrong on that for loop. If you start a at i, then it will start out NOT less than or equal to i - 10. Perhaps you meant

a >= i - 10

Upvotes: 2

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