51 lines
1.5 KiB
Plaintext
51 lines
1.5 KiB
Plaintext
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# ------------------------------------------------------------------------- #
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# --- Branches ------------------------------------------------------------ #
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#
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# It's possible to make the execution of a statement optional, based on the
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# result of an expression. Like in other languages, you do this using if-else
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# statements:
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if 1 < 2:
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print('Took the branch!\n'); # This is executed!
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if 1 > 2:
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print('Didn\'t take the branch\n'); # This isn't!
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# or you can specify an alternative branch, which is executed when the
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# condition isn't true:
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if 1 > 2:
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print('Not executed..\n');
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else
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print('Executed!\n');
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# You can have multiple statements inside a branch by having them inside a
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# compound statement. Compound statements are statement lists wrapped inside
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# curly brackets, like this:
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{ print('Hello from a '); print('compound statement!\n'); }
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# This way they count as one statement.
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if 1 == 1:
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{
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print('Executed\n');
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print('Also executed\n');
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}
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# Variables defined inside an if-else statement's branch are defined
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# in the parent's context. This implies that variables may or may not
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# be defined when you access them, based on which branch is taken.
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a = 1;
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if a < 2:
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x = 100;
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# Now x is defined, but is a were to be higher or equal to 2, it wouldn't
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# be defined and the runtime would return an error.
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#
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# ------------------------------------------------------------------------- #
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# ------------------------------------------------------------------------- #
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