A ICL Functions

Name	Type	Definition

ABS(X)	Real or Integer	$∣ x ∣$

ASIN(X)	Real	${sin}^{- 1} x w h e r e - 1 \leq x \leq 1$
		$- π / 2 \leq r e s u l t \leq π / 2$

ASIND(X)	Real	${sin}^{- 1} x w h e r e - 1 \leq x \leq 1$
		$- 90 \leq r e s u l t \leq 90$

ACOS(X)	Real	${cos}^{- 1} x w h e r e - 1 \leq x \leq 1$
		$0 \leq r e s u l t \leq π$

ACOSD(X)	Real	${cos}^{- 1} x w h e r e - 1 \leq x \leq 1$
		$0 \leq r e s u l t \leq 180$

ATAN(X)	Real	${tan}^{- 1} x$
		$- π / 2 \leq r e s u l t \leq π / 2$

ATAND(X)	Real	${tan}^{- 1} x$
		$- 90 \leq r e s u l t \leq 90$

ATAN2(X1,X2)	Real	${tan}^{- 1} (x_{1} / x_{2})$
		$- π < r e s u l t \leq π$ according to quadrant
		in which point ( $x_{2}, x_{1}$ ) lies

Name	Type	Definition

ATAN2D(X1,X2)	Real	${tan}^{- 1} (x_{1} / x_{2})$
		$- 180 < r e s u l t \leq 180$ according to quadrant
		in which point ( $x_{2}, x_{1}$ ) lies

BIN(I,n,m)	String	integer I formatted in binary
		into an n char string with m significant digits

CHAR(I)	String	Character whose ASCII value is I

COS(X)	Real	$cos x$ (x in radians)

COSD(X)	Real	$cos x$ (x in degrees)

COSH(X)	Real	$cosh x$

DATE()	String	The Current Date

DEC(I,n,m)	String	integer I formatted in decimal
		into an n char string with m significant digits

DECL(S)	Real	A Declination in Radians
		from a string in degrees, minutes, seconds

DEC2S(R,NDP,SEP)	String	String in DMS from
		Dec in radians. NDP decimal places on
		seconds. Character SEP separates fields

DIM(X1,X2)	Real or Integer	Positive difference
		$x_{1} - m i n (x_{1}, x_{2})$

ELEMENT(I,DELIM,S)	String	Ith element of delimited string, I $\geq 0$

EXP(X)	Real	$e^{x}$

FILE_EXISTS(S)	Logical	TRUE if file S exists

FLOAT(I)	Real	Integer I converted to real

GETNBS(S)	Any	Value of noticeboard item

GET_SYMBOL(S)	String	Get Value of DCL Symbol

Name	Type	Definition

HEX(I,n,m)	String	integer I formatted in hexadecimal
		into an n char string with m significant digits

IAND(I1,I2)	Integer	Bitwise AND of two integers

ICHAR(S)	Integer	ASCII value of first character of String

IEOR(I1,I2)	Integer	Bitwise exclusive OR of two integers

IFIX(X)	Integer	Real to Integer by Truncation
		Equivalent to INT

INDEX(S1,S2)	Integer	Position of first occurrence
		of Pattern S2 in string S1 (Zero if not found)

INKEY()	Integer	Key value of last trapped key pressed
		Only works in screen mode

INOT(I)	Integer	Bitwise Complement of Integer

INT(X)	Integer	Real to Integer by Truncation

INTEGER(X)	Integer	The value of X converted to an integer
		Equivalent to NINT

IOR(I1,I2)	Integer	Bitwise OR of two integers

KEYVAL(S)	Integer	Value of key with name S

LEN(S)	Integer	Length of String S

LGE(S1,S2)	Logical	True if S1 $\geq$ S2 (ASCII collating sequence)

LGT(S1,S2)	Logical	True if S1 $>$ S2 (ASCII collating sequence)

LLE(S1,S2)	Logical	True if S1 $\leq$ S2 (ASCII collating sequence)

LLT(S1,S2)	Logical	True if S1 $<$ S2 (ASCII collating sequence)

LOG(X)	Real	$ln x$

Name	Type	Definition

LOG10(X)	Real	${log}_{10} x$

LOGICAL(X)	Logical	The value of X converted to logical

MAX(X1,X2, ...)	Real or Integer	Maximum of two or more arguments

MIN(X1,X2, ...)	Real or Integer	Minimum of two or more arguments

MOD(X1,X2)	Real or Integer	$x_{1} - i n t (x_{1} / x_{2}) \times x_{2}$

NINT(X)	Integer	Nearest integer to X

OCT(I,n,m)	String	integer I formatted in octal
		into an n char string with m significant digits

OK(stat)	Logical	True if VMS Status OK

RA(S)	Real	Right Ascension in Radians
		from a string in hours, minutes, seconds

RA2S(R,NDP,SEP)	String	String in HMS from
		RA in radians. NDP decimal places on
		seconds. Character SEP separates fields

RANDOM(I)	Real	Random number between 0 and 1 from seed I
		I must be a variable

REAL(X)	Real	The value of X converted to real

SIGN(X1,X2)	Real or Integer	$x_{1}$ with sign of $x_{2}$

SIN(X)	Real	$sin x$ (x in radians)

SIND(X)	Real	$sin x$ (x in degrees)

SINH(X)	Real	$sinh x$

SNAME(S,n[,m])	String	String formed by concatenating string S with integer
		n formatted into m characters with leading zeros.
		If m is omitted, SNAME uses the required number
		of characters

Name	Type	Definition

STRING(X)	Logical	The value of X converted to a string

SQRT(X)	Real	$\sqrt{x}$

SUBSTR(S,n,m)	String	Substring of S beginning at n ( $\geq$ 1) of length m

TAN(X)	Real	$tan x$ (x in radians)

TAND(X)	Real	$tan x$ (x in degrees)

TANH(X)	Real	$tanh x$

TIME()	String	The current time

TYPE(X)	String	The Type of Variable X
		‘REAL’, ‘INTEGER’, ‘LOGICAL’,
		‘STRING’ or ‘UNDEFINED’

UNDEFINED(X)	Logical	TRUE if X is undefined

UPCASE(S)	String	String S converted to Upper case

VARIABLE(proc,X)	Any	Returns value of variable X of procedure proc

Appendix AICL Functions