Practice: switch_pairs

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Write a function named switch_pairs that accepts a string as a parameter and returns that string with each pair of neighboring letters reversed. If the string has an odd number of letters, the last letter should not be modified. For example, the call switch_pairs("example") should return "xemalpe" and the call switch_pairs("hello there") should return "ehll ohtree" .

Note that this function returns a string and does not print anything.

Requirements

• You should not make a list to solve this problem. You should solve it by building up a str .

Note

This problem was created on Code Step by Step .