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&allocated — cumulative allocation
&clock — time of day
&collections — garbage collections
&date — date
&dateline — date and time of day
&dump — set termination dump
&error — set error conversion
&errornumber — number of last error
&errortext — description of last error
&errorvalue — value causing last error
&features — implementation features
&file — source file
&host — host system
&level — procedure level
&null — null value
&progname — program name
&regions — storage regions
&storage — storage utilization
&time — elapsed time
&version — Icon version
args — get number of procedure arguments
collect — perform garbage collection
copy — copy value
delay — delay execution
display — display co-expression variables
errorclear — clear error indication
exit — exit program
function — generate function names
getenv — get value of environment variable
loadfunc — load external function
name — produce name
proc — convert to procedure
runerr — terminate with run-time error
serial — produce serial number
stop — stop execution
system — call system function
type — produce type name
variable — produce variable
x(x,…) — function call

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
dtor
 
convert degrees to radians
 
Description

r2 dtor(r1)
dtor(r1) produces the radian equivalent of r1 given in degrees.
 
Parameters
r1
an angle in degrees
returns
the angle in radians
 
Errors
102 r1 is not real
 
See Also
  • rtod — convert radians to degrees