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N^N — compute exponential
&e — base of natural logarithms
&phi — golden ratio
&pi — pi
&random : i — random seed
+N — compute positive
-N — compute negative
abs — compute absolute value
acos — compute arc cosine
asin — compute arc sine
atan — compute arc tangent
cos — compute cosine
dtor — convert degrees to radians
exp — compute exponential
i to i by i — generate integers in sequence
iand — compute bitwise AND
icom — compute bitwise complement
integer — convert to integer
ior — compute bitwise inclusive OR
ishift — arithmetic shift bits
ixor — compute bitwise exclusive OR
log — compute logarithm
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
numeric — convert to numeric
N~=N — numerically not equal
N–N — compute difference
real — convert to real
rtod — convert radians to degrees
seq — generate sequence of integers
sin — compute sine
sqrt — compute square root
tan — compute tangent

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
 
open file
 
Description

f open(s1, s2)
open(s1, s2) produces a file resulting from opening s1 according to options specified in s2, but fails if the file cannot be opened. See Options in the examples.

The default mode is to translate line termination sequences to linefeeds on input and conversely on output. The untranslated mode should be used when reading and writing binary files.
 
Parameters
s1
file path of the file to open
s2
a string of options. See Options in the examples.
returns
a file pointer
 
Defaults
s2
"rt"
 
Errors
103 s1 or s2 is not a string
209 invalid option
 
See Also
 
Examples

Example 1 — Options:
Options are specified as a single string without delimiters:
character  effect
"r"        open for reading
"w"        open for writing
"a"        open for writing in append mode
"b"        open for reading and writing
"p"        open a pipe
"c"        create
"t"        translate line termination sequences to linefeeds
"u"        do not translate line termination sequences to linefeeds