Search ('all' for everything):
Search results:
!x — generate values
+N — compute positive
-N — compute negative
.x — dereference variable
/x — check for null value
=s — match string in scanning
?x — generate random value
@C — activate co-expression
\x — check for non-null value
^C1 — create refreshed co-expression
|expr — evaluate repeatedly
~c1 — compute cset complement
∗x — compute size

Index of Function Types:
affects &pos
character sets
co-expressions
control structures
file processing
generators
infix operations
keywords
lists, sets and tables
math
metadata
output formatting
pattern matching
prefix operations
records
strings
windows and keyboards

Index of Subsystems:
base
digitcnt.icn
SNOBOL4 functions
 
generate values
 
Description

!x1 : x2, x3, ..., xn
!x1 is a generator.

If x1 is a file, !x1 generates the remaining lines of x1.

if x1 is a string, x1 generates the one-character substrings of x1, and produces variables if x1 is a variable.

If x1 is a list or record, !x1 generates the elements of x1, which are variables. The order of generation is from the beginning to the end.

If x1 is a set, !x1 generates the members of x1 in no predictable order.

If x1 is a table, !x1 generates the elements of x1 as variables in no predictable order.
 
Parameters
x1
file, string, variable, list, record, set or table
returns
successive values of x1 until failure.
 
Errors
103 x1 originally string, but type changed between resumptions.
116 x1 is not string, file, or a structure.
212 x1 is file but not open for reading.