Call a function: Difference between revisions
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(FutureBasic solution added) |
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Note, calling a <tt>function</tt> as if it was a <tt>procedure</tt> [i. e. ''discarding'' the return value] is only permitted if you set the compiler setting <tt>{$extendedSyntax on}</tt>/<tt>{$X+}</tt>. |
Note, calling a <tt>function</tt> as if it was a <tt>procedure</tt> [i. e. ''discarding'' the return value] is only permitted if you set the compiler setting <tt>{$extendedSyntax on}</tt>/<tt>{$X+}</tt>. |
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This is the default. |
This is the default. |
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=={{header|FreeBASIC}}== |
=={{header|FreeBASIC}}== |
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<syntaxhighlight lang="freebasic"> |
<syntaxhighlight lang="freebasic"> |
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1, 2, 3, 4, cadena, 6, 7, 8, \'incluye texto\'</pre> |
1, 2, 3, 4, cadena, 6, 7, 8, \'incluye texto\'</pre> |
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=={{header|FutureBasic}}== |
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No arguments |
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<syntaxhighlight lang="futurebasic"> |
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void local fn MyFunction |
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print @"MyFunction" |
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end fn |
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fn MyFunction |
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HandleEvents |
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</syntaxhighlight> |
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Fixed arguments |
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<syntaxhighlight lang="futurebasic"> |
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void local fn MyFunction( arg1 as long, arg2 as long, arg3 as long ) |
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print @"MyFunction" |
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end fn |
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fn MyFunction( 1, 2, 3 ) |
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HandleEvents |
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</syntaxhighlight> |
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Variable arguments |
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<syntaxhighlight lang="futurebasic"> |
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void local fn MyFunction( count as long, ... ) |
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va_list ap |
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long i, value |
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va_start( ap, count ) |
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for i = 1 to count |
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value = fn va_arglong( ap ) |
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print value |
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next |
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va_end( ap ) |
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end fn |
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fn MyFunction( 3, 12, 24, 36 ) |
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HandleEvents |
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</syntaxhighlight> |
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Return value |
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<syntaxhighlight lang="futurebasic"> |
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local fn MultiplyByThree( value as long ) as long |
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end fn = value * 3 |
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print fn MultiplyByThree( 13 ) |
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HandleEvents |
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</syntaxhighlight> |
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Value by reference |
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<syntaxhighlight lang="futurebasic"> |
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void local fn MultiplyByThree( value as ^long ) |
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*value *= 3 |
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end fn |
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long num |
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num = 9 |
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fn MultiplyByThree( @num ) |
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print num |
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HandleEvents |
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</syntaxhighlight> |
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=={{header|Gambas}}== |
=={{header|Gambas}}== |
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'''[https://gambas-playground.proko.eu/?gist=1bbbeb240f6fbca4b893271f1a19833b Click this link to run this code]'''<br> |
'''[https://gambas-playground.proko.eu/?gist=1bbbeb240f6fbca4b893271f1a19833b Click this link to run this code]'''<br> |
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Hello Hello Hello!! |
Hello Hello Hello!! |
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</pre> |
</pre> |
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=={{header|Go}}== |
=={{header|Go}}== |
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The following examples use functions from the standard packages |
The following examples use functions from the standard packages |
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bar(args["a"], args["b"], args["c"]) // prt 3, 2, 1 |
bar(args["a"], args["b"], args["c"]) // prt 3, 2, 1 |
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}</syntaxhighlight> |
}</syntaxhighlight> |
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* Within a statement context. |
* Within a statement context. |
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::Assignment statements are shown later. Only functions returning a single value can be used in a single value context: <syntaxhighlight lang="go"> if 2*g(1, 3.0)+4 > 0 {}</syntaxhighlight> |
::Assignment statements are shown later. Only functions returning a single value can be used in a single value context: <syntaxhighlight lang="go"> if 2*g(1, 3.0)+4 > 0 {}</syntaxhighlight> |
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fmt.Println(partial(5)) //prt 18 |
fmt.Println(partial(5)) //prt 18 |
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}</syntaxhighlight> |
}</syntaxhighlight> |
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=={{header|Groovy}}== |
=={{header|Groovy}}== |
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There are two types of first-class functions in Groovy. |
There are two types of first-class functions in Groovy. |
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