Putting things in parentheses

I want to achieve why people put things inside paranthesis, not functions.
I have tried looking it up, but no result.

So, for example here:

if (this.Value >= otherthis.Value) then
blablblblabla

--version 2
if this.Value >= otherthis.Value then
bllablalbalba

In version one, you can see that it puts the code in the parenthesis, and in example2, they don’t do that. Why’s that?

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Edit: Solved, for those not knowing. It’s to make things easier to read.