Question

What is the use of the sqrt() function?

(a) To find the square of a number

(b) To find the square root of a number

(c) To find the cube root of a number

(d) To find the cube of a number

The question was posed to me in an interview.

Question is taken from Mathematical Functions in section Arduino Programming of Arduino

Answer 1

Right answer is (b) To find the square root of a number

The best explanation: The sqrt() function is used to find the square root of a number. It takes one argument; the number whose square root is to be found out. This function can accept any number-based datatypes and gives the output in the double datatype.