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Update README.md
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@ -272,26 +272,33 @@ Control structures affect the flow of control through the program. There are co
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fin
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```
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The when/is/otherwise/wend statement is similar to the if/elsif/else/fin construct except that it is more efficient. It selects one path based on the evaluated expressions, then merges the code path back together at the end. However only the 'when' value is compared against a list of expressions. The expressions do not need to be constants, they can be any valid expression. The list of expressions is evaluated in order, so for efficiency sake, place the most common cases earlier in the list.
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The when/is/otherwise/wend statement is similar to the if/elsif/else/fin construct except that it is more efficient. It selects one path based on the evaluated expressions, then merges the code path back together at the end. However only the 'when' value is compared against a list of expressions. The expressions do not need to be constants, they can be any valid expression. The list of expressions is evaluated in order, so for efficiency sake, place the most common cases earlier in the list. Just as in C programs, a 'break' statement is required to keep one clause from falling through to the next. Falling through from one clause to the next can have it's uses, so this behavior has been added to PLASMA.
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```
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when keypressed
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is keyarrowup
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cursup
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break
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is keyarrowdown
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cursdown
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break
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is keyarrowleft
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cursleft
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break
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is keyarrowright
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cursright
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break
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is keyctrlx
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cutline
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break
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is keyctrlv
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pasteline
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break
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is keyescape
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cursoff
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cmdmode
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redraw
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break
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otherwise
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bell
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wend
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