Search ('all' for everything):
Search results:
N^N — compute exponential
expr & expr — evaluate in conjunction
expr \ i — limit generator
expr1 | expr2 — evaluate alternatives
L|||L — concatenate lists
N%N — compute remainder
N+N — compute sum
N/N — compute quotient
N1∗N2 — compute product
N<=N — numerically less than or equal
N<N — numerically less than
N=N — numerically equal
N>=N — numerically greater than or equal
N>N — numerically greater than
N~=N — numerically not equal
N–N — compute difference
R.f — get field of record
s ? expr — scan string
s<<=s — lexically less than or equal
s<<s — lexically less than
s==s — lexically equal
s>>=s — lexically greater than or equal
s>>s — lexically greater than
s||s — concatenate strings
s~==s — lexically not equal
v op:=x — augmented assignment
v:=:v — exchange values
v:=x — assign value
v<–>v — exchange values reversibly
v<–x — assign value reversibly
x++x — compute cset or set union
x===x — value equal
x@C — transmit value to co-expression
x~===x — value not equal
x––x — compute cset or set difference
x∗∗x — cset or set intersection

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
 
produce substring or list section
 
Description

x1[i1-:i2] : x2
If x1 is a string, x1[i1-:i2] produces the substring of x1 between i1 and i1 - i2. x1[i1-:i2] produces a variable if x1 is a variable.

If x1 is a list, x1[i1-:i2] produces a list consisting of the values of x1 in the given range.

In either case, i1 and i2 may be nonpositive.

In either case, the subscripting operation fails if a subscript is out of range.
 
Parameters
x1
string or list
i1
integer initial subscript
i2
integer ending subscript
returns
subset of string or list or fail
 
Errors
101 i1 or i2 not integer
114 x1 not string or list
 
See Also
  • x[x] — subscript
  • x[i:i] — produce substring or list section
  • x[i+:i] — produce substring or list section