Call a function: Difference between revisions
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imported>J7M (add example for SmallBASIC) |
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macro definition is responsible for evaluating what it needs to. But macros likely |
macro definition is responsible for evaluating what it needs to. But macros likely |
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fall into a different category than the scope of this task. |
fall into a different category than the scope of this task. |
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=={{header|SmallBASIC}}== |
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<syntaxhighlight lang="basic"> |
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func F1() |
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return 1 |
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end |
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func F2(a) |
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return a + 1 |
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end |
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func F3(a, b) |
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return a + b |
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end |
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func F4(byref a) |
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a = 5 |
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return a + 1 |
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end |
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sub S1(a, b) |
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print a, b |
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end |
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sub S2(byref a) |
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a = 5 |
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end |
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var1 = 1 |
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var2 = 2 |
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' Functions return a result and return-value must be assigned to a variable |
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result = F1() |
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result = F2(var1) |
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result = F3(var1, var2) |
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' Parameters are passed by reference if byref is used in function definition |
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result = F4(var1) ' result = 6 and var1 = 5 |
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' Subroutines can't return a result |
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S1(var1, var2) |
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' Parameters are passed by reference if byref is used in sub definition. |
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' This can be used to return a result indirectly |
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S2(var1) ' var1 = 5 |
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' Functions and subroutines can take expressions as parameter |
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result = F2(1 + 2) |
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</syntaxhighlight> |
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=={{header|Smalltalk}}== |
=={{header|Smalltalk}}== |
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