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

How to Eliminate "Unused Variable in For Loop" Error

Working with code snippets similar to the one below can often result in the "unused variable in a loop" error:

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

This error arises because we haven't assigned the variable t to anything within the loop.

Solution:

To avoid this error while无需 assigning anything to the unused variable, simply utilize the for range syntax:

ticker := time.NewTicker(time.Millisecond * 500)
go func() {
    for range ticker.C {
        fmt.Println("Tick")
    }
}()
time.Sleep(time.Second * 2)

By omitting the t variable assignment, the compiler will recognize that we're only interested in the loop's iteration and not the specific value stored in t. This approach effectively eliminates the unused variable error while maintaining the intended functionality.

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