function AlphabetCount(n)
    local base = string.byte([[A]]);
    local ret = {};
    local f = function(n)
        local ret = [[]];
        
        while n ~= 0 do
            local c = math.mod(n - 1,26);
            ret = string.char(base + c) .. ret;
            n = math.floor((n - 1) / 26);
        end
        
        return ret;
    end
    
    for i = 1,n,1 do
        table.insert(ret,f(i));
    end
    
    return ret;
end

require([[mylib]]);
PrintTable(AlphabetCount(arg[1]));

>lua5.1.exe 021-AlphabetCount.lua 100
[A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,AA,AB,AC,AD,AE,AF,AG,AH,AI,
AJ,AK,AL,AM,AN,AO,AP,AQ,AR,AS,AT,AU,AV,AW,AX,AY,AZ,BA,BB,BC,BD,BE,BF,BG,BH,BI,BJ
,BK,BL,BM,BN,BO,BP,BQ,BR,BS,BT,BU,BV,BW,BX,BY,BZ,CA,CB,CC,CD,CE,CF,CG,CH,CI,CJ,C
K,CL,CM,CN,CO,CP,CQ,CR,CS,CT,CU,CV]

>lua5.1.exe source\021-030\021-AlphabetCount.lua 1000
[A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,AA,AB,AC,AD,AE,AF,AG,AH,AI,
AJ,AK,AL,AM,AN,AO,AP,AQ,AR,AS,AT,AU,AV,AW,AX,AY,AZ,BA,BB,BC,BD,BE,BF,BG,BH,BI,BJ
,BK,BL,BM,BN,BO,BP,BQ,BR,BS,BT,BU,BV,BW,BX,BY,BZ,CA,CB,CC,CD,CE,CF,CG,CH,CI,CJ,C
K,CL,CM,CN,CO,CP,CQ,CR,CS,CT,CU,CV,CW,CX,CY,CZ,DA,DB,DC,DD,DE,DF,DG,DH,DI,DJ,DK,
DL,DM,DN,DO,DP,DQ,DR,DS,DT,DU,DV,DW,DX,DY,DZ,EA,EB,EC,ED,EE,EF,EG,EH,EI,EJ,EK,EL
,EM,EN,EO,EP,EQ,ER,ES,ET,EU,EV,EW,EX,EY,EZ,FA,FB,FC,FD,FE,FF,FG,FH,FI,FJ,FK,FL,F
M,FN,FO,FP,FQ,FR,FS,FT,FU,FV,FW,FX,FY,FZ,GA,GB,GC,GD,GE,GF,GG,GH,GI,GJ,GK,GL,GM,
GN,GO,GP,GQ,GR,GS,GT,GU,GV,GW,GX,GY,GZ,HA,HB,HC,HD,HE,HF,HG,HH,HI,HJ,HK,HL,HM,HN
,HO,HP,HQ,HR,HS,HT,HU,HV,HW,HX,HY,HZ,IA,IB,IC,ID,IE,IF,IG,IH,II,IJ,IK,IL,IM,IN,I
O,IP,IQ,IR,IS,IT,IU,IV,IW,IX,IY,IZ,JA,JB,JC,JD,JE,JF,JG,JH,JI,JJ,JK,JL,JM,JN,JO,
JP,JQ,JR,JS,JT,JU,JV,JW,JX,JY,JZ,KA,KB,KC,KD,KE,KF,KG,KH,KI,KJ,KK,KL,KM,KN,KO,KP
,KQ,KR,KS,KT,KU,KV,KW,KX,KY,KZ,LA,LB,LC,LD,LE,LF,LG,LH,LI,LJ,LK,LL,LM,LN,LO,LP,L
Q,LR,LS,LT,LU,LV,LW,LX,LY,LZ,MA,MB,MC,MD,ME,MF,MG,MH,MI,MJ,MK,ML,MM,MN,MO,MP,MQ,
MR,MS,MT,MU,MV,MW,MX,MY,MZ,NA,NB,NC,ND,NE,NF,NG,NH,NI,NJ,NK,NL,NM,NN,NO,NP,NQ,NR
,NS,NT,NU,NV,NW,NX,NY,NZ,OA,OB,OC,OD,OE,OF,OG,OH,OI,OJ,OK,OL,OM,ON,OO,OP,OQ,OR,O
S,OT,OU,OV,OW,OX,OY,OZ,PA,PB,PC,PD,PE,PF,PG,PH,PI,PJ,PK,PL,PM,PN,PO,PP,PQ,PR,PS,
PT,PU,PV,PW,PX,PY,PZ,QA,QB,QC,QD,QE,QF,QG,QH,QI,QJ,QK,QL,QM,QN,QO,QP,QQ,QR,QS,QT
,QU,QV,QW,QX,QY,QZ,RA,RB,RC,RD,RE,RF,RG,RH,RI,RJ,RK,RL,RM,RN,RO,RP,RQ,RR,RS,RT,R
U,RV,RW,RX,RY,RZ,SA,SB,SC,SD,SE,SF,SG,SH,SI,SJ,SK,SL,SM,SN,SO,SP,SQ,SR,SS,ST,SU,
SV,SW,SX,SY,SZ,TA,TB,TC,TD,TE,TF,TG,TH,TI,TJ,TK,TL,TM,TN,TO,TP,TQ,TR,TS,TT,TU,TV
,TW,TX,TY,TZ,UA,UB,UC,UD,UE,UF,UG,UH,UI,UJ,UK,UL,UM,UN,UO,UP,UQ,UR,US,UT,UU,UV,U
W,UX,UY,UZ,VA,VB,VC,VD,VE,VF,VG,VH,VI,VJ,VK,VL,VM,VN,VO,VP,VQ,VR,VS,VT,VU,VV,VW,
VX,VY,VZ,WA,WB,WC,WD,WE,WF,WG,WH,WI,WJ,WK,WL,WM,WN,WO,WP,WQ,WR,WS,WT,WU,WV,WW,WX
,WY,WZ,XA,XB,XC,XD,XE,XF,XG,XH,XI,XJ,XK,XL,XM,XN,XO,XP,XQ,XR,XS,XT,XU,XV,XW,XX,X
Y,XZ,YA,YB,YC,YD,YE,YF,YG,YH,YI,YJ,YK,YL,YM,YN,YO,YP,YQ,YR,YS,YT,YU,YV,YW,YX,YY,
YZ,ZA,ZB,ZC,ZD,ZE,ZF,ZG,ZH,ZI,ZJ,ZK,ZL,ZM,ZN,ZO,ZP,ZQ,ZR,ZS,ZT,ZU,ZV,ZW,ZX,ZY,ZZ
,AAA,AAB,AAC,AAD,AAE,AAF,AAG,AAH,AAI,AAJ,AAK,AAL,AAM,AAN,AAO,AAP,AAQ,AAR,AAS,AAT
,AAU,AAV,AAW,AAX,AAY,AAZ,ABA,ABB,ABC,ABD,ABE,ABF,ABG,ABH,ABI,ABJ,ABK,ABL,ABM,ABN
,ABO,ABP,ABQ,ABR,ABS,ABT,ABU,ABV,ABW,ABX,ABY,ABZ,ACA,ACB,ACC,ACD,ACE,ACF,ACG,ACH
,ACI,ACJ,ACK,ACL,ACM,ACN,ACO,ACP,ACQ,ACR,ACS,ACT,ACU,ACV,ACW,ACX,ACY,ACZ,ADA,ADB
,ADC,ADD,ADE,ADF,ADG,ADH,ADI,ADJ,ADK,ADL,ADM,ADN,ADO,ADP,ADQ,ADR,ADS,ADT,ADU,ADV
,ADW,ADX,ADY,ADZ,AEA,AEB,AEC,AED,AEE,AEF,AEG,AEH,AEI,AEJ,AEK,AEL,AEM,AEN,AEO,AEP
,AEQ,AER,AES,AET,AEU,AEV,AEW,AEX,AEY,AEZ,AFA,AFB,AFC,AFD,AFE,AFF,AFG,AFH,AFI,AFJ
,AFK,AFL,AFM,AFN,AFO,AFP,AFQ,AFR,AFS,AFT,AFU,AFV,AFW,AFX,AFY,AFZ,AGA,AGB,AGC,AGD
,AGE,AGF,AGG,AGH,AGI,AGJ,AGK,AGL,AGM,AGN,AGO,AGP,AGQ,AGR,AGS,AGT,AGU,AGV,AGW,AGX
,AGY,AGZ,AHA,AHB,AHC,AHD,AHE,AHF,AHG,AHH,AHI,AHJ,AHK,AHL,AHM,AHN,AHO,AHP,AHQ,AHR
,AHS,AHT,AHU,AHV,AHW,AHX,AHY,AHZ,AIA,AIB,AIC,AID,AIE,AIF,AIG,AIH,AII,AIJ,AIK,AIL
,AIM,AIN,AIO,AIP,AIQ,AIR,AIS,AIT,AIU,AIV,AIW,AIX,AIY,AIZ,AJA,AJB,AJC,AJD,AJE,AJF
,AJG,AJH,AJI,AJJ,AJK,AJL,AJM,AJN,AJO,AJP,AJQ,AJR,AJS,AJT,AJU,AJV,AJW,AJX,AJY,AJZ
,AKA,AKB,AKC,AKD,AKE,AKF,AKG,AKH,AKI,AKJ,AKK,AKL,AKM,AKN,AKO,AKP,AKQ,AKR,AKS,AKT
,AKU,AKV,AKW,AKX,AKY,AKZ,ALA,ALB,ALC,ALD,ALE,ALF,ALG,ALH,ALI,ALJ,ALK,ALL]

function toUpper(str)
    return string.upper(str);
end

print(toUpper(arg[1]));

>lua5.1.exe 074-toUpper.lua abc
ABC

function getType(o)
    return type(o);
end

print(getType({1,2,3,4,5}));
print(getType(123));
print(getType([[123]]));
print(getType(123 == [[123]]));
print(getType(getType));

>lua5.1.exe 085-getType.lua
table
number
string
boolean
function

function trimR(str)
    return (string.gsub(str,[[ +$]],[[]]));
end

function qPrint(str)
    print([[']] .. str .. [[']]);
end

qPrint(arg[1]);
qPrint(trimR(arg[1]));

>lua5.1.exe 093-trimR.lua "  hoge moge  "
'  hoge moge  '
'  hoge moge'

>lua5.1.exe 093-trimR.lua "uniuni"
'uniuni'
'uniuni'

function replace(str,from,to)
    return (string.gsub(str,from,to));
end

print(arg[1],replace(arg[1],arg[2],arg[3]));

>lua5.1.exe 095-replace.lua Hello,World l i
Hello,World     Heiio,Worid

>lua5.1.exe 095-replace.lua HogeHoge o a
HogeHoge        HageHage

>lua5.1.exe 095-replace.lua HogeHoge Hoge uni
HogeHoge        uniuni