Chapter 5. Motifs and Loops

This chapter continues demonstrating the basics of the Perl language begun in Chapter 4. By the end of the chapter, you will know how to:

• Search for motifs in DNA or protein

• Interact with users at the keyboard

• Write data to files

• Use loops

• Use basic regular expressions

• Take different actions depending on the outcome of conditional tests

• Examine sequence data in detail by operating on strings and arrays