Making decisions with if and else
The C++ if and else keywords are what allow us to make decisions. We have already seen if in action in the previous chapter when we detected whether the player had pressed the Esc key each frame:
if (Keyboard::isKeyPressed(Keyboard::Escape))
{
window.close();
}
So far, we have seen how we can use arithmetic and assignment operators to create expressions. Now, we will look at some new operators.
Logical operators
Logical operators are going to help us to make decisions by building expressions that can be tested for a value of either true or false. At first, this might seem like quite a narrow choice and insufficient for the kind of choices that might be needed in an advanced PC game. Once we dig a little deeper, we will see that we can make all of the required decisions we will need with just a few of the logical operators.
Here is a table of the most useful logical operators. Look at them and the associated examples...