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Can identifier be any sequence of digits and letters?

Anonymous

∙ 12y ago

Updated: 11/2/2022

If you mean a variable name, then no -- it must begin with a letter or an underscore, but any combination of letters, digits and underscores may follow.

If you mean a variable that stores an identifier, then yes -- so long as the identifier is a string type.

Wiki User

∙ 12y ago

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Q: Can identifier be any sequence of digits and letters?

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What are the rules of creating identifier?

Identifiers refers to the names of variables, functions and array. These are user defined names and consist of a sequence of letters and digits, with a letters as a first character.Both uppercase and lowercase letters are permitted, although lowercase letters are commonly used. The underscore character is also permitted in identifiers. It is usually used as a link between two words in long identifiers. In C, identifiers may contain any alphanumeric characters (a-z, A-Z, 0-9) as well as underscores (_), but must not begin with a number.

Is it any valid printable ascii character can be used inan identifier?

In programming languages, identifiers are used to name variables, functions, etc. In most languages, identifiers must start with a letter (uppercase or lowercase) or an underscore, followed by letters, digits, or underscores. Therefore, not all printable ASCII characters can be used in an identifier. Symbols such as @, #, $, and % are typically not allowed in identifiers.

What are the various rules for writing an identifier name in C language?

An identifier starts with one of [_, a-z, A-Z] and may continue with one or more of [_, a-z, A-Z, 0-9]. There are often length limitations as well as limitations involving leading underscores, [_], and identifiers may not exactly match any reserved word.

Why keyword cannot be used as an identifier in c language?

It's by design; this way the lexical parser is able to decide that any given string is a keyword or an identifier.

Differentiate keywords and identifiers in C programming?

keywords:- every word in a c program is either a keyword or an identifier. All keywords are basically the sequences of characters that have one or fixed meanings. And these meanings in any circumtances , can't be changed. All c keywords must be written in lowercase (small) letters. eg:- auto, break ,case, char, const, do, if ,double, else .....etc identifiers:- identifiers r names given to program elements such as variables , arrays & functions. Basically identifers r the sequences of alphabets or digits. Rules for forming identifier name * the first character must be analphabet (uppercase or lowercase) or an underscore * all succeeding characters must be letters or digits. * no special characters or punctuatio symbols are allowed except the underscore"_". * no two successive underscores are allowed. * keywords shouln't be used as identifiers.

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Related Questions

What are the rules of creating identifier?

Identifiers refers to the names of variables, functions and array. These are user defined names and consist of a sequence of letters and digits, with a letters as a first character.Both uppercase and lowercase letters are permitted, although lowercase letters are commonly used. The underscore character is also permitted in identifiers. It is usually used as a link between two words in long identifiers. In C, identifiers may contain any alphanumeric characters (a-z, A-Z, 0-9) as well as underscores (_), but must not begin with a number.

What is identifiers in c?

An identifier is a combination of alpha numeric characters, the first being the letter of an alphabet or an underline, and the remaining being any letter of the alphabet, any numeric digit, or the underline. An Identifier is a name for a variable, type, type member, template, class, function, namespace etc and is usually limited to letters, digits and underscores..

What are consecutive digits?

the numbers 0 through 9 written in sequence or any portion of that sequence

Given an arbitrary sequence of digits how can you prove it appears somewhere in pi?

It has not yet been proven whether any arbitrary sequence of digits appears somewhere in the decimal expansion of pi.

Which number when rounded to the nearest hundredth is 53.07?

It can be 53.06 with any digit greater than '4' plus any additional sequence of digits after the '6', and it can be 53.07 with any digit less than '5' plus any additional sequence of digits after the '7'. There are an infinite number of them.

Yacc program to recognize a valid variable which starts with letters followed by any number of level of digits?

%{ #include<stdio.h> int valid=1; %} %token digit letter %% start : letter s s : letter s | digit s | ; %% int yyerror() { printf("\nIts not a identifier!\n"); valid=0; return 0; } int main() { printf("\nEnter a name to tested for identifier "); yyparse(); if(valid) { printf("\nIt is a identifier!\n"); } }

Is it any valid printable ascii character can be used inan identifier?

In programming languages, identifiers are used to name variables, functions, etc. In most languages, identifiers must start with a letter (uppercase or lowercase) or an underscore, followed by letters, digits, or underscores. Therefore, not all printable ASCII characters can be used in an identifier. Symbols such as @, #, $, and % are typically not allowed in identifiers.

What is the meaning of the sequence of digits in 7 777?

In numerology, any repeating sequence of numbers is a good sign. In cursory research, the term 'angel numbers' came up quite a bit. In angelology, the sequence of numbers, especially the number 7, in digits of three or more is considered to be very lucky.

Do ANY number series in pi repeat themselves?

There are short strings of digits which will repeat, but there is no sequence which will repeat forever.

What are the various rules for writing an identifier name in C language?

An identifier starts with one of [_, a-z, A-Z] and may continue with one or more of [_, a-z, A-Z, 0-9]. There are often length limitations as well as limitations involving leading underscores, [_], and identifiers may not exactly match any reserved word.

How many different 5 character passwords can you create from the following situations The code can be a mixture of letters and digits in any order and is case sensitive?

You can make 916,132,832 different five-character passwords if the code can be a mixture of letters and digits in any order and is case sensitive.

What is alphanumeric of?

alphanumeric letters are all those which are included in the group from Capital and small letters from English alphabets and decimal digits Any subset of {(A to Z),(a to z),(0 to 9)}

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