Question

Write an if-statement to throw an IllegalArgumentException when x is less than zero. (Assume that x is a double variable.)

Answer 1

An if-statement to throw an IllegalArgumentException when x is less than zero can be written as: if (x < 0) { throw new IllegalArgumentException("x must not be less than zero."); }

Step-by-step explanation:

The student has asked for an if-statement to throw an IllegalArgumentException when a variable x, which is of type double, is less than zero.

Here is how you can write the if-statement in Java:

if (x < 0) {
throw new IllegalArgumentException("x must not be less than zero.");
}

It is important to use exception handling responsibly by providing a clear message indicating the reason the exception is being thrown.