The only difference is when you want to include " or ' inside the string. If you want to include the "like" quote, then escape it ("\"", '\''). If you include the "unlike" quote, no escape is needed ("'" or '"').
I think that people new to programming will use '' if it is unshifted on their keyboards. People from a "C" background may use "" for strings (since in that language, '' is for a single character only). Jeff
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