Count the Capital Letters

JavaScriptHardstringsloopslanguage_fundamentalsregex

Instructions

Given a string of letters, how many capital letters are there?

capitalLetters("fvLzpxmgXSDrobbgMVrc") ➞ 6

capitalLetters("JMZWCneOTFLWYwBWxyFw") ➞ 14

capitalLetters("mqeytbbjwqemcdrdsyvq") ➞ 0

N/A

javascript

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Walks through the solution with reasoning and edge cases.