Problems with a variable defined in a for loop C#

Question

Me and my friend have been hacking at it for hours but we just can't figure out what's wrong with it. It's essentially running through an array and if the button should be locked or interactable, and if it's null it'll be interactable. By using player prefs these settings should persist through each session with the app.

Here's the code:

for (i = 0; i < buttons.Length; i = i + 1) {

    if (PlayerPrefs.GetInt("button" + string.Format i) == null) {

        PlayerPrefs.SetInt("button" + string.Format i, 1);
    }

    if (PlayerPrefs.GetInt("button" + string.Format i) == 1) {

        button.interactable = true;

    } else {

        button.interactable = false;

    }
}

Currently unity is displaying 5 errors:

error CS1525: Unexpected symbol `i' (2 of these)
error CS1519: Unexpected symbol `else' in class, struct, or interface member declaration
error CS1519: Unexpected symbol `=' in class, struct, or interface member declaration
error CS8025: Parsing error

i = 0; line should be int i = 0; that's what's causing the symbol error. — Bennett Yeo
– Bennett Yeo, Commented Oct 22, 2016 at 23:24

DoubleVoid · Accepted Answer · 2016-10-22 23:23:39Z

5

Just a guess, but you should write:

for (int i = 0; i < buttons.Length; ++i) {

You maybe forgot to declare i

Also this line:

PlayerPrefs.GetInt("button" + string.Format i)

string.Format is a static method of string. The syntax is wrong. You can write it this way:

PlayerPrefs.GetInt("button" + i)

Or this way:

PlayerPrefs.GetInt(string.Format("button{0}",i));

answered Oct 22, 2016 at 23:23

DoubleVoid

8051 gold badge16 silver badges47 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

Harvey Parker-Acheson Over a year ago

Thank you this solved my problem :D Sorry I'm new to C# so I don't know all of the syntax yet for strings etc.

DoubleVoid Over a year ago

Sure thing! :) I'm glad I could help!

DoubleVoid Over a year ago

Ah, and if it helped you, please mark this post as an answer :) Clicking on the check mark

Jim Over a year ago

++i needs to be i++

DoubleVoid Over a year ago

it makes no difference in a for loop, since the increment is a single operation instruction. makes sense using it like: var value = ++i;

Collectives™ on Stack Overflow

Problems with a variable defined in a for loop C#

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related