exclamation-marks-series-number-4-remove-all-exclamation-marks-from-sentence-but-ensure-a-exclamation-mark-at-the-end-of-string

Exclamation marks series #4: Remove all exclamation marks from sentence but ensure an exclamation mark at the end of string

Description:

Remove all exclamation marks from sentence but ensure an exclamation mark at the end of string. For a beginner kata, you can assume that the input data is always a non-empty string, no need to verify it.

Examples

"Hi!" ---> "Hi!"
"Hi!!!" ---> "Hi!"
"!Hi" ---> "Hi!"
"!Hi!" ---> "Hi!"
"Hi! Hi!" ---> "Hi Hi!"
"Hi" ---> "Hi!"