12 Jan Variables in C Programming
Variable name in C Language are the names given to locations in memory. These locations can be an integer, character or real constants. In addition, a variable type can only hold the same constant type. In this lesson we will learn how to work with Variables in C Programming.
Rules for Variable naming
First character in a variable name must be an underscore or alphabet. Here are the rules, with some examples,
- A variable name is a combination of alphabets 1 to 31, digits, or underscores.
- No special symbol in a variable name is valid, except underscore.
- No comma is allowed in a variable name.
- In addition, no blank space is valid.
Always try to create meaningful names. For example, variable name for calculation results of students can be given variable name result.
Declaration of a variable in C language is quite easy. The following is the syntax showing how to declare variables in C programming,
The valid variable declaration examples are shown below. Here, int, char and float are datatypes,
int marks_one, marks_two;
char s = ‘P’;
The preceding examples show how a variable is declared, wherein a datatype precedes the variable name.
The following examples demonstrates the usage of variables in C Programming,