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This chapter is from the book


In this chapter, you learned how to use functions in shell scripts. Some of the important topics you learned about are

  • Creating functions

  • Invoking functions

  • Using variable scope

  • Function chaining and recursion

  • Return codes from functions

  • Data sharing between functions

In Chapter 21, "Problem Solving with Functions," you will revisit functions and learn how to create a set of functions that can be used in multiple scripts. In the next chapter, you will explore the topic of text filtering.

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