Chapter 9: If Statements

It's time to address the elephant in the room, if statements. If statements are ways to check conditions and run code in different manners. 

For example, we can just use a single if keyword followed by an expression to run code.

obj x = 5;

if x == 5 { # glang supports the '==', '!=', '>=', '<=', 'and', 'or', 'not' operators

    bark("x is 5!");

}

We can go a step further and use the otherwise keyword to add what's called a "default case". This is what case is triggered if no conditions match; think of it like a backup generator for a building, it only runs if all power fails.

obj x = 10;

if x == 5 {

    bark("x is 5!");

} otherwise {

    bark("something happened:( x is not 5");

}

The alsoif keyword is used in chain with if statements to essentially check expressions if other expressions fail. It's a step above the otherwise case; like the fuse panel for a building.

obj x = 10;

if x == 5 {

    bark("x is 5!");

} alsoif x == 10 {

    bark("x is 10!");

} otherwise {

    bark("something happened:( x is not 5");

}

There can be as many alsoif cases as needed:

obj x = 10;

if x == 1 {

    bark("x is 1!");

} alsoif x == 2 {

    bark("x is 2!");

} 

# ...

  alsoif x == 9 {

    bark("x is 9!");

} alsoif x == 10 {

    bark("x is 10!");

} otherwise {

    bark("something happened:( x is not 5");

}