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A function is declared as sqrt(-x) under the header file math.h, what will the function return?

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A function is declared as sqrt(-x) under the header file math.h, what will the function return?

(a) square root of x

(b) complex number

(c) domain error

(d) range error

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This interesting question is from Mathematical functions topic in division C Library of C

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Correct answer is (c) domain error

Explanation: double sqrt (double x);

The sqrt function computes the nonnegative square root of x. A domain error occurs if the argument is negative.

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