Ellipsis (computer programming): Difference between revisions

Revision as of 10:04, 19 March 2019

Revision as of 10:17, 19 March 2019

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In the [[C (programming language)|C programming language]], an ellipsis is used to represent a [[variadic function|variable number of parameters]] to a [[function (programming)|function]]. For example:

:<{{code>|2=c|int printf( const char* format, ... );</code>}}<ref>http://www.cplusplus.com/reference/cstdio/printf/</ref>

The above function in C could then be called with different types and numbers of parameters such as:

:<{{code>|2=c|printf("numbers %i %i %i", 5, 10, 15);</code>}}

and

:<{{code>|2=c|printf("input string %s, %f", "another string", 0.5);</code>}}

[[C99]] introduced macros with a [[variadic macro|variable number of arguments]].<ref>[https://gcc.gnu.org/onlinedocs/gcc/Variadic-Macros.html Variadic Macros - Using the GNU Compiler Collection (GCC)]</ref>

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As of version 1.5, [[Java (programming language)|Java]] has adopted this "varargs" functionality. For example:

:<{{code>|2=java|public int func(int num, String... strings)</code>}}

===PHP===

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Produces this output:

<source lang="php">

array(3) {

[0]=>

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int(5)

}

</source>

== Multiple dimensions ==