ICL Functions

Where the type is given as `Real or Integer' the type of the result is the same as the type of the argument.

Name	Type	Definition
ABS(X)	Real or Integer	$\mid x \mid$
ASIN(X)	Real	$\sin^{-1} x \; where -1 \leq x \leq 1$
		$-\pi/2 \leq result \leq \pi/2$
ASIND(X)	Real	$\sin^{-1} x \; where -1 \leq x \leq 1$
		$-90 \leq result \leq 90$
ACOS(X)	Real	$\cos^{-1} x \; where -1 \leq x \leq 1$
		$0 \leq result \leq \pi$
ACOSD(X)	Real	$\cos^{-1} x \; where -1 \leq x \leq 1$
		$0 \leq result \leq 180$
ATAN(X)	Real	$\tan^{-1} x$
		$-\pi/2 \leq result \leq \pi/2$
ATAND(X)	Real	$\tan^{-1} x$
		$-90 \leq result \leq 90$
ATAN2(X1,X2)	Real	$\tan^{-1} (x_{1}/x_{2})$
		$-\pi < result \leq \pi$ according to quadrant
		in which point ($x_{2},x_{1}$) lies

Name	Type	Definition
ATAN2D(X1,X2)	Real	$\tan^{-1} (x_{1}/x_{2})$
		$-180 < result \leq 180$ 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
		$x_{1} - min(x_{1},x_{2})$
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	$x_{1} - int(x_{1}/x_{2}) \times x_{2}$
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