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&errout — standard error output
&input — standard input
&output — standard output
chdir — change directory
close — close file
digitcnt — count the number of digits in a file.
flush — flush output
open — open file
read — read line
reads — read string
remove — remove file
rename — rename file
seek — seek to position in file
stop — stop execution
where — produce position in file
write — write line
writes — write string

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
basemath
abs
 
compute absolute value
 
Description

N2 abs(N1)
abs(N1) produces the absolute value of N1.
 
Parameters
N1
numeric (i or r)
returns
absolute value of N1.
 
Errors
102 N1 is not numeric.