Editing C-- (section)

==Example code==
The following C-- code calculates the sum and product of integers 1 through n<ref>{{Citation
| first1=Norman |last1=Ramsey  |first2=Simon Peyton |last2=Jones  |first3=Christian |last3=Lindig
| date=2005-02-23
| title=The C-- Language Specification, version 2.0 (CVS Revision 1.128)
| page=7
| url=https://www.cs.tufts.edu/~nr/c--/extern/man2.pdf
| accessdate=2023-06-22
}}</ref>
(n is received as an argument).
It demonstrates two language features:

* Procedures can return multiple results.
* Tail recursion is explicitly requested with the "jump" keyword.

<syntaxhighlight lang="c">
/* Tail recursion */
export sp;
sp( bits32 n ) {
  jump sp_help( n, 1, 1 );
}

sp_help( bits32 n, bits32 s, bits32 p ) {
  if n==1 {
      return( s, p );
  } else {
      jump sp_help( n-1, s+n, p*n );
  }
}
</syntaxhighlight>