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Chapter 10. Expressions > Looping Animations

Looping Animations

Maybe the coolest feature unique to expressions (one that users often wish was built into the After Effects user interface) is the ability to loop a set of keyframes. It's so easy to learn and powerful, however, that once you understand it, you might even like it.

What's up with spaces? Typing “x * x” or “x*x” in an expression has the same result. In fact, you can put as many spaces as you want between the operator (*) and its operands (x). It's purely a matter of what you prefer to look at. Where you get into trouble is in adding spaces where they don't belong, such as in the middle of a name; valueX is not the same as value X. If there are spaces in a name you pickwhip, the name appears in parentheses, for example:

motionTracker ("Tracker 1") ("Track Point 1").



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