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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

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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