Elif False Control Map Property

If the "elif" statement tested false, then the "Control" map remains the same. More formally,

if the following are true:

  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • expression state at time t = "end_expr"
  • Return Value at time t = False

then Control Map at time (t + 1) = Control Map at time t

If the "elif" statement tested false, then LW Python leaves "Control" map unchanged. This means the "Control" map entry for the current tab number remains "if":False. We know that the top element is "if":False because if it was "if":True, then the "elif" test would not even be evaluated (it would be skipped).

Here is an example:

if the following are true:

  • the line at time 22 = 3
  • the tab at time 22 = 0
  • statement at line 3, tab 0 = elif __eq__(7, 9):
  • expression state at time 22 = "end_expr"
  • Return Value at time 22 = False

then Control Map at time (22 + 1) = Control Map at time 22

Try stepping through the simulator to see the "Control" map remain the same after the "elif" test is evaluated.

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LW Python State
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