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Bullet-proof scripting
MEL and Expressions
Testing and comparing values
User Guide
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General
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MEL and Expressions
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Controlling the flow of a script
Topics in this section
Testing and comparing values
Boolean values
if...else if...else
?: operator
switch...case
while
do...while
for
for-in
break
continue
Testing the existence of commands, objects, and attributes
The difference between = and ==
Common problems