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CP CVDT Q55

55The library function sqrt operates on a double precision argument. If, i is an integer variable, then which of the following calls would correctly compute sqrt(i)?
  • Option : A
  • Explanation : The sqrt function is declared in the math.h header and calculates the square root of its argument. The standard sqrt function accepts a double and returns a double. When an integer argument is supplied, it is converted to double. A call such as sqrt((double)i) explicitly converts the integer variable i before calculating its square root.
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