Generate Random Number expression in After Effects

Generate a random number as an expression value.

seedRandom(index, true);
x = random(500);
[x + value[0], x + value[1]];
Note that the expression is for a 2-dimensional property like Scale or Position.
If you need it to work with properties like Opacity or Rotation, use this one instead:
seedRandom(index, true);
x = random(500);
x;Pro tip: Go to AEJuice Pack Manager – Expressions Pack to apply this expression in 1 click. Here are direct links for the latest plugin version:
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