The latest articles on DEV Community by Ashish Kumar (@jhakumarashish). https://dev.to/jhakumarashish https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F281257%2F50a97147-ef79-4afc-9081-3a7d82398855.jpg https://dev.to/jhakumarashish en Ashish Kumar Tue, 14 Apr 2020 13:02:06 +0000 https://dev.to/jhakumarashish/rules-to-define-identifiers-in-python-1809 https://dev.to/jhakumarashish/rules-to-define-identifiers-in-python-1809 <ol> <li>The only allowed characters in Python are alphabet symbols(either lower case or upper case) digits(0 to 9) underscore symbol(_)</li> </ol> <p>By mistake if we are using any other symbol like $ then we will get syntax error.<br> cash = 10 Correct<br> ca$h = 20 Incorrect</p> <ol> <li><p>Identifier should not starts with digit<br> 123total Correct <br> total123 Incorrect</p></li> <li><p>Identifiers are case sensitive. Of course Python language is case sensitive language.</p></li> </ol> <p>total=10<br> TOTAL=999<br> print(total) #10<br> print(TOTAL) #999</p> <p>Identifier:</p> <ol> <li><p>Alphabet Symbols (Either Upper case OR Lower case)</p></li> <li><p>If Identifier is start with Underscore (_) then it indicates it is private.</p></li> <li><p>Identifier should not start with Digits.</p></li> <li><p>Identifiers are case sensitive.</p></li> <li><p>We cannot use reserved words as identifiers<br> Eg: def=10 </p></li> <li><p>There is no length limit for Python identifiers. But not recommended to use too lengthy<br> identifiers.Identifier:</p></li> <li><p>Dollor ($) Symbol is not allowed in Python.</p></li> </ol>