Chilton::ACL::Functions

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Early history □ Minutes of committee meetings □ Progress reports □ Other reports □ News cuttings □ In-house publications □ Committee papers □ Personal recollections □ ACL publications □ Books □ Early Atlas publications □ FR80 reports □ Atlas manuals □ ICL1906A manuals □ Other manuals

Algol Language □ Algol Library □ Atlas Autocode □ ABL (Atlas Basic Language) □ ABL exercises □ Atlas Supervisor □ Atlas 1 Extracodes □ Atlas 1 Operators □ Atlas 1 Preparing a program □ Atlas 1 Supervisor and Fixed Store routines □ Atlas 1 Supervisor Vol 1 □ Atlas 1 Supervisor Vol 2 □ Atlas 1 Supervisor Vol 3 □ Atlas 1 Features: Early Ferranti paper □ Atlas Testing □ Input/Output for Atlas 1 and 2 □ Atlas Computer: Ferranti Overview □ Atlas Bible □ Atlas 2 Supervisor

Further reading □ Preface □ Contents □ Note on certain Supervisor features □ 1. Presenting an Algol Program to Atlas □ 2. Variations on Algol 60 □ 3. Monitor printing and fault diagnosis □ 4. Code procedures □ 5. Input and Output □ 6. Miscellaneous programming notes □ Appendices and indices □ A1. ICT 7-track punched tape code □ A2. Hardware representation □ A3. Fault table □ A4. Standard functions and system procedures □ Index to Supervisor and compiler printings □ General index

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⟶ ACL ⟶ Literature ⟶ Atlas manuals ⟶ Algol :: ATLAS 1 COMPUTER ALGOL REFERENCE MANUAL

⟶ ACL ⟶ Literature ⟶ Atlas manuals ⟶ Algol :: ATLAS 1 COMPUTER ALGOL REFERENCE MANUAL

ACL ACD C&A INF CCD CISD Archives

Applications Associates Literature Society Technology Software revisited

Early history □ Minutes of committee meetings □ Progress reports □ Other reports □ News cuttings □ In-house publications □ Committee papers □ Personal recollections □ ACL publications □ Books □ Early Atlas publications □ FR80 reports □ Atlas manuals □ ICL1906A manuals □ Other manuals

Algol Language □ Algol Library □ Atlas Autocode □ ABL (Atlas Basic Language) □ ABL exercises □ Atlas Supervisor □ Atlas 1 Extracodes □ Atlas 1 Operators □ Atlas 1 Preparing a program □ Atlas 1 Supervisor and Fixed Store routines □ Atlas 1 Supervisor Vol 1 □ Atlas 1 Supervisor Vol 2 □ Atlas 1 Supervisor Vol 3 □ Atlas 1 Features: Early Ferranti paper □ Atlas Testing □ Input/Output for Atlas 1 and 2 □ Atlas Computer: Ferranti Overview □ Atlas Bible □ Atlas 2 Supervisor

Appendix 4 Standard functions and system procedures

Reference	Procedure	Specifier	Remarks	Type	Value or Effect Definition	Serial No.
(3.2.4) 2.2.2	abs(E)	real		real	modulus (absolute value) of the value of E	1
(3.2.4) 2.2.2	sign(E)	real		integer	sign of the value of E (+1 for E>0, 0 for E=0, -1 for E<0)	2
(3.2.4) 2.2.2	sqrt(E)	real	E≥0	real	square root of the value of E	3
(3.2.4) 2.2.2	sin(E)	real	E in radians	real	sine of the value of E	4
(3.2.4) 2.2.2	cos(E)	real	E in radians	real	cosine of the value of E	5
(3.2.4) 2.2.2	arctan(E)	real		real	principal vale (between -π/2 and π/2) of the arctangent of the value of E in radians	6
(3.2.4) 2.2.2	ln(E)	real	E>0	real	natural logarithm of the value of E	7
(3.2.4) 2.2.2	exp(E)	real		real	exponential function of the value of E (e^E)	8
(3.2.5) 2.2.2	entier(E)	real		integer	largest integer not greater than the value of E	9
5.2.1	select input(E)	integer	E≥0 and defined in job description	-	selects input document with number the value of E	10
5.2.1	select output(E)	integer	E≥0 and defined in job description	-	selects output document with number the value of E	11
5.2.2.1	read	-		real	next number from input	12
5.2.2.2	read Boolean	-		Boolean	next truth value from input	13
5.2.3.2	output(E)	real		-	outputs the value of E	14
5.2.3.1	print(E,F,G)	real E; integer F,G;	F,G≥0	-	outputs the value of E to a format defined by the values of F and G	15
5.2.4.1	write text(S)	string	E≥1	-	outputs the string S	16
5.2.4.2	space(E)	integer	E≥1	-	outputs a number of spaces equal to the value of E	17
5.2.4.2	newline(E)	integer		-	outputs a number of newlines equal to the value of E	18
5.2.4.2	paper throw	-		-	outputs paper throw to top of next page	19
5.2.3.3	write Boolean(E)	Boolean		-	outputs the value of E	20

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