Challenge Your Knowledge of Character Classification Functions in C

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Questions and Answers

Which function returns a true value if c is a digit and false otherwise?

  • isxdigit
  • isalnum
  • isdigit (correct)
  • isalpha

Which function returns a true value if c is a letter and false otherwise?

  • isalpha (correct)
  • isalnum
  • isxdigit
  • isdigit

Which function returns a true value if c is a whitespace character and false otherwise?

  • islower
  • ispunct
  • isspace (correct)
  • isupper

Which function returns a true value if c is a hexadecimal digit character and false otherwise?

<p>isxdigit (C)</p> Signup and view all the answers

Which function returns a true value if c is a lowercase letter and false otherwise?

<p>islower (D)</p> Signup and view all the answers

Which function returns a true value if c is a printing character other than a space, a digit, or a letter and false otherwise?

<p>ispunct (D)</p> Signup and view all the answers

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