Data commit

Task/Call-a-function/XLISP/call-a-function.l

@@ -0,0 +1,19 @@
+; call a function (procedure) with no arguments:
+(foo)
+
+; call a function (procedure) with arguments:
+(foo bar baz)
+; the first symbol after "(" is the name of the function
+; the other symbols are the arguments
+
+; call a function on a list of arguments formed at run time:
+(apply foo bar)
+
+; In a REPL, the return value will be printed.
+; In other contexts, it can be fed as argument into a further function:
+(foo (bar baz))
+; this calls bar on the argument baz and then calls foo on the return value
+
+; or it can simply be discarded
+(foo bar)
+; nothing is done with the return value