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    +1 bang on and I can't believe I had to scroll through so many poor answers to find it! Commented Feb 1, 2012 at 8:46
  • I actually had trouble grokking math functions for a while cause i had learned some coding first, and the concept of a function that 'is' instead of 'doing things' baffled me. :3 Commented Oct 3, 2014 at 0:35