If

The if-statement has the following syntax:

    if(<expression>) {
       <block executed if true>
    } [else {
       <block executed if false>
    }]

If the expression is true the first block of code is executed, if it's false, the second block is executed. The else block is optional. Example:

    if(user.lastName = "Doe") {
       msg := "You are unkown";
    }