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Grouping expressions is a way to specify order of evaluation, which is useful if you need to work around operator precedence.
You can group expressions by using ().
For example, the expressions (y2 - y1) and (x2 - x1) below are evaluated before dividing the numbers.
Verse
(y2 - y1) / (x2 - x1)As an example, take an in-game explosion that scales its damage based on the distance from the player, but where the player's armor can reduce the total damage:
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BaseDamage : float = 100
Armor : float = 15
# Scale by square distance between the player and the explosion. 1.0 is the minimum
DistanceScaling : float = Max(1.0, Pow(PlayerDistance, 2.0))
# The farther the explosion is, the less damage the player takes
var ExplosionDamage : float = BaseDamage / DistanceScaling
# Reduce the damage by armor
Using grouping, you could rewrite the example above as:
Verse
BaseDamage : float = 100
Armor : float = 15
DistanceScaling : float = Max(1.0, Pow(PlayerDistance, 2.0))
ExplosionDamage : float = Max(0.0, (BaseDamage / DistanceScaling) - Armor)Grouping expressions can also improve the readability of your code.