Indicates whether a give string is blank.
A string is blank if it is empty or contains only blank characters: https://developer.mozilla.org/en-US/docs/Glossary/Whitespace
A string to determine whether it's blank.
whether s is blank.
s
Indicates whether a give string is blank.
A string is blank if it is empty or contains only blank characters: https://developer.mozilla.org/en-US/docs/Glossary/Whitespace