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!x
— generate values
+N
— compute positive
-N
— compute negative
.x
— dereference variable
/x
— check for null value
=s
— match string in scanning
?x
— generate random value
@C
— activate co-expression
\x
— check for non-null value
^C1
— create refreshed co-expression
|expr
— evaluate repeatedly
~c1
— compute cset complement
∗x
— compute size
Index of Function Types:
affects &pos
character sets
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control structures
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generators
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keywords
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strings
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Index of Subsystems:
base
digitcnt.icn
SNOBOL4 functions
base
—
math
tan
compute tangent
Description
r2 tan(r1)
tan
(
r1
) produces the tangent of
r1
radians
.
Parameters
r1
angle in
radians
, not π/2
returns
tangent of
r1
Errors
102
r1
is not
real
204
r1
singular point of tangent
See Also
atan
— compute arc tangent