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Variable in C language

Posted By : Samina Khan, 26 Oct 2012

Updated On : 26 Oct 2012

Version Support : All

Keywords : variable,variables,variables in c,variable in c,variables in c language,types of variables,types of variables in c,types of variables in c language

Variable

Variables or symbolic variables are the names of storage location of computer memory whose values may vary during execution of a program.

These memory location may contain integer, real or character constant.

There are always two values associated with a symbolic variable.

(i) It’s data value(read value) stored at some location in memory and is referred as variable’s rvalue.

(ii) It’s location value(address value) the address at which it’s data value is stored and is referred as variable’s lvalue.

Key points about variable

In ANSI standard, C recognizes length of a variable up to 31 characters. However, length should not be more than 8 characters. Since, many compilars treat only first 8 character as significant.
For example :
```
 average_score and average_speed 
```
are treated as same variable.
It can be written as :
```
 avg_score and avg_speed or score_average and speed_average
```
Upper and lower case are significant (means case sensitive)
For example :
```
 samina , Samina and SAMINA
```
are different.

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Variable in C language

Variable

Key points about variable

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