Logical conditions that we will look at will be AND & OR. This section reminds me of Electronics and first year of Engineering.
set x to true set y to true if x and y then display dialog "True" else display dialog "False" end if
Explanation: For AND to hold true, both inputs should be true. In above Script both x and y are true and hence if section will get executed.
Figure 10.5.1 AND Condition
set x to true set y to false if x or y then display dialog "True" else display dialog "False" end if
Explanation: For OR to hold true, either one of the inputs should be true. In above Script, x is true whereas y is fals. However the if condition is met, hence if section will get executed.
Figure 10.5.2 OR Condition
set x to true set y to false set z to (x and y) -- z is false set p to (x or y) -- p is true
Explanation: Here x is true and y is false. I declared variable z and assigned it with value of AND operation performed on x and y. p is assigned with value of OR operation performed on x and y. Hence z is false and p is true.
set x to true set y to "xyz" if x and y = "xyz" then beep else say "False Condition" end if
Explanation: Here x is a boolean type and y is String type. In if condition I have used AND command where one of the variable is true. However we need to check for y variable. So I am checking contents of y variable with xyz. If they match then the other variable will return true. And since both return true the if section will get executed.