"Let" Functions in FileMaker - Your Ticket to the Next Level - with Nick Hunter - Day 1

Not using the "Let" function while coding FileMaker Pro is like speaking English without using verbs... The "Let" function is a mandatory step toward excellence. Mastering this function is what will make your code powerful, easy, fast and robust. Nick Hunter will tell you all about "Let", as only he can.

source https://www.youtube.com/watch?v=kAom0zRisUM