How Can I Fix the \'Unused Variable in For Loop\' Error in Go?

Eliminating "Unused Variable in for Loop" Error for Unutilized Variables

When working with for loops, you may encounter an error message stating "unused variable." This occurs when a variable declared within the loop, such as in this code snippet:

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

remains unused. To address this, instead of assigning the variable to something, you can directly use the for range construct:

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

This code ensures that no variable is declared and remains unused within the for loop, eliminating the "unused variable" error.

This usage of for range effectively iterates over the channel C, printing "Tick" at regular intervals, but without the need to explicitly use the variable assigned within the loop.

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