Write a forward declaration ie a prototype for a function th

Write a forward declaration (i.e. a prototype) for a function that takes a number as a parameter, represented as a double, and evaluates to the square root of that number.

Solution

Answer:

The forward declaration for the given function is :

\" public double sqrt(double number); \"

Forward declaration is like you declare the function first without implementing it. But you implement it in the end. Let me show you an example :

public double sqrt(double number);

public int main()

{

cout << sqrt(25);

}

public double sqrt(double number)

{

return Math.sqrt(number);

}

The first part is called forward declaration where you just declare the function, but not implement it. You implement it at the bottom after the main function.