How Do I Fix \'Unused Variable\' Errors in Go\'s For Loops?

Fixing "Unused Variable" Errors in For Loops

In Go, you may encounter an error message stating "unused variable in a for loop." This occurs when you define a variable within a loop but don't explicitly use it. For instance, consider the following code:

ticker := time.NewTicker(time.Millisecond * 500)
go func() {
    for t := range ticker.C {
        fmt.Println("Tick at", t)
    }
}()

Here, the t variable is assigned within the loop but is not actually used. To resolve this error, you can simply remove the variable assignment altogether:

ticker := time.NewTicker(time.Millisecond * 500)
go func() {
    for range ticker.C {
        fmt.Println("Tick")
    }
}()

This modified code will no longer produce the "unused variable" error. It does this by using the range keyword, which iterates over the channel's values without explicitly assigning them to variables.

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