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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
co-expressions
control structures
file processing
generators
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keywords
lists, sets and tables
math
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output formatting
pattern matching
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strings
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Index of Subsystems:
base
digitcnt.icn
SNOBOL4 functions
base
—
math
asin
compute arc sine
Description
r2 asin(r1)
asin
(
r1
) produces the arc sine of
r1
in the range of
-π/2
to
π/2
for
r1
in the range
–1
to
1
.
Parameters
r1
real,
-1
≤
r1
≤
1
returns
arc sin
of
r1
Errors
102
r1
is not
real
.
205
|
r1
| greater than 1
See Also
sin
— compute sine