Which function converts a string to lowercase?

Which function converts a string to lowercase?

• A. Upper
• B. Lower
• C. InitCap
• D. Length

Answer: (B)

Converting a string to all lowercase is done by applying a function that maps every letter to its lowercase form. The function named Lower does exactly this: it returns the same string with every alphabetic character turned into lowercase. Upper would do the opposite, turning letters to uppercase. InitCap would capitalize the first letter (or first letter of each word, depending on the language), and Length would tell you how many characters are in the string, not change its case. For example, applying Lower to "TeSt" yields "test".

Converting a string to all lowercase is done by applying a function that maps every letter to its lowercase form. The function named Lower does exactly this: it returns the same string with every alphabetic character turned into lowercase. Upper would do the opposite, turning letters to uppercase. InitCap would capitalize the first letter (or first letter of each word, depending on the language), and Length would tell you how many characters are in the string, not change its case. For example, applying Lower to "TeSt" yields "test".