C Language (Variables in C)

HOW TO DECLARE A VARIABLES IN C

Variables are run time entities and these are used to hold temporary data at program run time. 

In C, Every variable declare with a predefined data type.

LEARN DATA TYPES IN C

RULES FOR NAMING VARIABLE

RULE 1: Variable name cannot declare with a reserved keyword.

EXAMPLES

int void (wrong declaration)

int void1 (correct declaration)

RULE 2: Variable does not contain any blank space.

EXAMPLES

int a bc (wrong declaration)

int a_bc (Correct declaration)

RULE 3: Variable name should not start with a number.

EXAMPLES

int 2abc (wrong declaration)

int a123 (correct declaration)

RULE 4: Two variables cannot declare with same name.

EXAMPLES

int a, a; (wrong declaration)

int a, b; (Correct declaration)

PROGRAM TO SWAPPING VALUES >>

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