Scripting Languages I Node. Python, PHP, Rubya side by side reference sheetsheet one version grammar and execution variables and expressions arithmetic and logic strings regexes dates and time arrays dictionaries functions execution control exceptions threadssheet two streams asynchronous events files file formats directories processes and environment option parsing libraries and namespaces objects inheritance and polymorphism reflection net and web gui databases unit tests logging debuggingversionnode. V python version php version ruby versionimplicit prologue  npm install lodashconst requirelodash import os, re, sys sudo apt install php mbstringnonegrammar and executionnode. UTF 8. Python 3 source is UTF 8 by default Python 2 source is US ASCII coding us ascii none. Coreldraw Home And Student X6 more. Ruby 2. 0 source is UTF 8 by default coding utf 8 end of line comment  comment comment comment comment commentmultiple line comment lineanother line use triple quote string literal comment lineanother linecomment lineanother line begincomment lineanother lineendvariables and expressionsnode. ES6 let x 1 let y 2, z 3 older alternative to let var x 1 let local scope is nearest enclosing block var local scope is nearest function body. File. Var n nonenonenoneglobal variableglobal. Global global. ES6const PI 3. PI 3. 1. 4definePI, 3. PI 3. 1. 4 warning if capitalized identifier is reassigned. PI 3. 1. 4assignment v 1 assignments can be chained but otherwise dont return values v 1v 1 v 1parallel assignment  new in ES6 let x, y, z 1, 2, 3 x, y, z 1, 2, 3 raises Value. Error x, y 1, 2, 3 raises Value. 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NfUA2e4wY/VmRnqyUO_EI/AAAAAAAADVA/15YUFzYKoQE/s1600/1.PNG' alt='Python Print Line Number In File' title='Python Print Line Number In File' />Php The mbstring package adds UTF8 aware string functions with mb prefixes. We assume that os, re, and sys are always imported. Grammar and Execution. CommandLine Example. The commandline application that we are creating will have the following interface python file. NAME. N, or Infinity depending upon sign of dividend. There are literals for Infinity and Na. N. raises Zero. Division. Errorreturns FALSE with warningraises Zero. Division. Errorfloat division 2. Python 2 float2. Zero. Division. Errorreturns FALSE with warningreturns Infinity, Na. N, or Infinitypower Math. Math. sqrt2import mathmath. Mathsqrt2sqrt 1 Na. N raises Value. Error import mathmath. Na. NMath. sqrt 1 raises Math Domain. Error unless require complex is in effect. Math. exp Math. log Math. Math. cos Math. tan Math. Math. acos Math. atan Math. Mathexp log sin cos tan asin acos atan atan. Math. PIMath. Eimport mathmath. MPI MEinclude Math. PI Efloat truncation none. Math. round3. 1Math. Math. ceil3. 1import mathintxintroundxmath. Math. abs 3absxabsxx. Bignumfloat overflow Infinityraises Overflow. Error. INFInfinityrational construction nonefrom fractions import Fractionx Fraction2. Math. floorMath. Math. Python 2. 0x. 2a. String7parse. Int6. Stringstr Python 2 unicode array of bytes string. Stringstring literal dont say nodont say nodont say nodont say nodont say no Python 2 and Python 3 uloremuipsumdont say nodont say nodont say nodont say nodont say nonewline in literal  backquote literals only first linesecond line Backslashes can be used to break long strings. Uhhhhhhhh. In Python 2, u and U only available in string literals with u prefixdouble quoted f n r t v xhh ooosingle quoted double quoted a b cx e f n r s t v xhh ooo uhhhh uhhhhhsingle quoted here document nonenoneword amet s lt lt lt EOFlorem ipsumdolor sit word. EOF word amets lt lt EOFlorem ipsumdolor sit wordEOFvariable interpolation let count 3 let item ball let s count items count 3item ballprintcount items. Python 3. 6 printfcount itemscount 3 item ball echo count itemsn count 3item ballputs count itemsexpression interpolation1 1 1 11 1. Python 3. 6 f1 1 1 1none1 1 1 1format string  None use string concatenation. Evaluates to 1. Fixed2lorem s d f ipsum, 1. Hello, World s Hello, s. World juxtaposition can be used to concatenate literals s. Serious Sam 2 Full Version For Pc. Hello, Worlds Hello, s. World s Hello, s. World juxtaposition can be used to concatenate literals s. Hello, Worldreplicate let hbar. Upper. CaseLOREM. Lower. Caselorem. LOREM. lowermbstrtoupperloremmbstrtolowerLOREM strtoupperstrtolower are ASCII onlylorem. LOREM. downcasecapitalizestring, words. Hp Laserjet P2014 Printer Driver For Windows 8. ASCII only ucfirststrtolowerloremucwordsstrtolowerlorem ipsum Unicode title case mbconvertcaselorem ipsum, MBCASETITLElorem. 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