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What is the return type of the function sqrt()?

  • A.int
  • B.float
  • C.double
  • D.Depends on the data type of the parameter

Answer: C

Correct answer: double

sqrt is declared in <math.h> as double sqrt(double) - it takes and returns a double. C99 added sqrtf and sqrtl for float and long double, but the return type of sqrt itself does not vary with the argument.

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