zigzag

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Main Page → Exercises → Python → Solve an Exercise

Language/Type: Python recursion

Write a recursive function zigzag that accepts an integer parameter n and that prints out n characters as follows. The middle character of the output should always be an asterisk ("*"). If you are asked to write out an even number of characters, then there will be two asterisks in the middle ("**"). Before the asterisk(s) you should write out less-than characters ("<"). After the asterisk(s) you should write out greater-than characters (">"). For example, the following calls produce the following output:

Call	Output
`zigzag(1)`	`*`
`zigzag(2)`	`**`
`zigzag(3)`	`<*>`
`zigzag(4)`	`<**>`
`zigzag(5)`	`<<*>>`
`zigzag(6)`	`<<**>>`
`zigzag(7)`	`<<<*>>>`
`zigzag(8)`	`<<<**>>>`

Your function should throw a ValueError if passed a value less than 1. Note that the output does not advance to the next line.

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zigzag