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43 lines
1.0 KiB
Python
43 lines
1.0 KiB
Python
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"""
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This algorithm helps you to swap cases.
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User will give input and then program will perform swap cases.
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In other words, convert all lowercase letters to uppercase letters and vice versa.
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For example:
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1. Please input sentence: Algorithm.Python@89
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aLGORITHM.pYTHON@89
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2. Please input sentence: github.com/mayur200
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GITHUB.COM/MAYUR200
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"""
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import re
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# This re.compile() function saves the pattern from 'a' to 'z' and 'A' to 'Z'
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# into 'regexp' variable
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regexp = re.compile("[^a-zA-Z]+")
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def swap_case(sentence):
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"""
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This function will convert all lowercase letters to uppercase letters
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and vice versa.
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>>> swap_case('Algorithm.Python@89')
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'aLGORITHM.pYTHON@89'
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"""
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new_string = ""
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for char in sentence:
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if char.isupper():
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new_string += char.lower()
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if char.islower():
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new_string += char.upper()
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if regexp.search(char):
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new_string += char
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return new_string
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if __name__ == "__main__":
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print(swap_case(input("Please input sentence:")))
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