Ask AI: What does function sqrt do? Which header file must be included to use the function sqrt?

The `sqrt` function computes the square root of a given number. It takes a single argument, which is the number you want to find the square root of, and returns the result as a floating-point value. To use the `sqrt` function in a C or C++ program, you must include the `math.h` header file. Here's a simple example of how to use it: ```c #include <stdio.h> #include <math.h> int main() { double number = 9.0; double result = sqrt(number); printf("Square root of %.2f is %.2f\n", number, result); return 0; } ``` In this example, the `sqrt` function is called with `number` (9.0) as its argument, and its result (3.0) is stored in the `result` variable. The program then prints the result.