How to Multiply an Integer by `time.Duration` in Go?

Problem: Multiplying Duration by Integer in Go

When attempting to test concurrent goroutines by introducing a random delay, the compiler throws the following error:

.\crawler.go:49: invalid operation: rand.Int31n(1000) * time.Millisecond (mismatched types int32 and time.Duration)

Solution: Converting Between Types

The error occurs because int32 (the return type of rand.Int31n(1000)) is incompatible with time.Duration (the type required for time.Sleep()). To resolve this issue, the integer value must be converted to a duration before being multiplied. This can be achieved using the following code:

time.Sleep(time.Duration(rand.Int31n(1000)) * time.Millisecond)

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