lower(): all lower case letters.

my_str='Welcome to Plus2net'
output=my_str.lower()
print(output)                # welcome to plus2net

my_str='WELCOME TO PLUS2NET'
output=my_str.lower()
print(output)                # welcome to plus2net

my_str='welcome to plus2net'
output=my_str.lower()
print(output)                # welcome to plus2net

All String methods upper() islower() isupper()

istitle() capitalize() Python- Tutorials

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