WaitGroups

What is a WaitGroup?

A WaitGroup blocks a program and waits for a set of goroutines to finish before moving to the next steps of execution.

How to use WaitGroup?

We can use WaitGroups through the following functions:

• .Add(int): This function takes in an integer value which is essentially the number of goroutines which the waitgroup has to wait for. This function must be called before we execute a goroutine.
• .Done(): This function is called within the goroutine to signal that the goroutine has successfully executed.
• .Wait()

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