Algol 68 - ACM Digital Library

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118 van Wijngaarden, et al.ALGOL <strong>68</strong> Revised Report1199.4.1. Representations of symbolsa) Letter symbolssymbolletter a symbol{814c,82k,942B,A346b}letter b symbol[814c,82k,942B,A344b}letter e symbol{814e,82k,942B,A348a}letter d symbol{814c,82k,942B,A342f}letter e symbol{812h,814e,82k,942B,A343e}letter f symbol{814c,82k,942B.A349a}[letter g symbol{814e,942B.A34~a}letter h symbol{814c,942B}letter i symbol{814c,942B,A345b}letter j symbol{814e,942B}letter k symbol{814c,942B,A341f}letter I symbol{814e,942B,A341f}letter m symbol{814e,942B}letter n symbol{814e,942B,A341h}letter o symbol{814c,942B}letter p symbol{814e,942B,A341f}letter q symbol{814c,942B,A341f}letter r symbol{814c,82c,942B,A347c}letter s symbol{814c,942B,A3411}letter t symbol{814c,942B}letter u symbol{814c,942B}letter v symbol{814e,942B}letter w symbol{814c,942B}letter x symboi{814c,942B,A341f}letter y symbol{814c,942B,A341f}letter z symbol{814e,942B,A342d}b) Denotation symbolsdigitdigitdigitdigitdigitdigitdigitdigitdigitsymbolrepresenta!ionabcdefghijklmnopqrstuvwxyzzero symbol[81 le,814c,82h,942C} 0one symbol{43b,81 le,814c,82g,h,942C} Itwo symbol[43b,81 lc,814e,82d,i,942C} 2three symbol(43b,81 lc,814c,82i,942C} 3four symbol{43b,81 lc,814c,82e,j,942C} 4five symbol{43b,81 lc,814e,82j,942C] 5six symboi{43b,81 le,814e,82g,j,942C} 6seven symbol{43b,81 lc,814e,82j,942C} 7eight symbol{43b,81 le,814e,82f,k,942C} 8digit nine symbol{43b,811e,S14c,82k,942C}point symbol{812d,814c,A343d}times ten to the power symbol{812h}rel)resenlation9i-xltrue symbol{8t3a}false symbol{813a}quote symbol{814a,83a}quote image symbol{814b}space symbol{814c}comma symbol{814c]empty symbol{815a}c) Operator symbolssymbolor symbol{942H}and symbol{942H}ampersand symbol{942H}differs from symbol{942H}is less than symbol{942I}is at most symbol{942H}is at least symbol{942H}is greater than symbol{942I}divided by symbol{942I}over symbol{942H}percent symbol{942H}window symbol{942H}floor symbol{942H}ceiling symbol{942H}plus i times symbol{942H}not symbol{942H}tilde symbol{942H}down symboi{942H}up symbol{942H}plus symbol{812j,814c,942H,A342e}minus symbol{812j,814c,942H,A342e}equals symbol{942I}times symbol{942I}asterisk symbol{942I}assigns to symbol{942J}becomes symbol{44f,521a,942J}d) Declaration symbolssymbolis defined as symbol{42b,43b,44c,45c}long symbol{810a,82a}short symbol[810a,82b}reference to symbol{46c}local symbol{523a,b}heap symbol{523a,b}truefalsertemptyrepresent:l! ionv^&/÷Dtf_tll+X$=::=representationlongshorttelIocheap
120structure symbol{46d}flexible symbol{46g}procedure symbol{44b,46o}union of symbol{46s}operator symbol{45a}priority symbol{43a}mode symbol{42a}e) Mode standardssymbolintegral symbol{942E}real symbol{942E}boolean symboi[942E}character symbol{942E}format symbol{942E}void symbol{942E}complex symbol{942E}bits symbol[942E}bytes symbol{942E}string symbol{942E}sema symbol{942E}file symbol{942E}channel symbol{942E}f) Syntactic symbolssymbolvan Wijngaarden, et al.structflexprocunionoppriomoderepresentationintrealboolcharformatvoidcomplbitsbytesstringsemafilechannelbold begin symbol{133d}beginbold end symbol{133d}endbrief begin symbol{133d,A348b,A34Ab} (brief end symbol{133d,A348b,A34Ab} )and also symbol{133c,33b,f,34h,41a,b,46e,i,q,t,532b,541e,543b,A348b,A34Ac,d}go on symbol{32b}completion symbol{32b}exitlabel symbol{32c}parallel symbol{33c}paropen symbol{814c} (close symbol{814c} )bold if symbol{91a}ifbold then symbol{91b}thenbold else if symbol{91c}elifbold else symbol{91d}elsebold fi symbol{91e}fibold case symbol{91a}casebold in symbol{91b}inrepresentationbold ouse symbol{91c}bold out symbol{91d}bold esac symbol{91e}brief if symbol{91a}brief then symbol{91b}brief else if symbol{91c}brief else symbol{91d}brief fi symbol{91e}brief case symbol{91a}brief in symbol{91b}brief ouse symbol{91c}brief out symbol{gld}brief esac symbol{91e}colon symbol{34j,k}brief sub symbol{133e}brief bus symbol{133e}style i sub symbol{133e}style i bus symbol{133e}up to symbol{46j,k,l,532f}at symbol{532g}is symbol{522b}is not symbol{522b}nil symbol{524a}of symbol{531a}routine symbol{541a,b}bold go to symbol{544b}bold go symbol{544b}skip symbol{552a}formatter symbol{A341a}g) Loop symbolssymbolbold for symbol{35b}bold from symbol{35d}bold by symbol{35d}bold to symbol{35d,544b}bold while symbol{35g}bold do symbol{35h}bold od symbol{35h}h) Pragment symbolssymbolbrief comment symbol{92b}bold comment symboi{92b}style i comment symbol{92b}ALGOL <strong>68</strong> Revised Reportouseoutesac(JI:I)(JI:r)[]()@:=:oofgotogo$atis:/=:nilskiprepresentationforfrombytowhiledoodrepresentation¢commentcoisnt121\\ \
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