Variable & Datatype for C-programming                                      5    Variable:- Whose value change is known as variable.You can use some specific variable.    Ex:-a,b,c         A,B,C         a1,b2     But 1a,2b, space, special character are  not allowed.    Underscore is allowed.     Datatype:- Before declaration variable you need to define the type of variable i.e. integer, character, float etc     Variable declaration:- You can define a variable in following way.     Syntax:- datatype  variablename;      Eg:-int x;         int a;         float q;     Variable intialization:- In this step you have to give the value of variable.     During character intialization write character within the '   '     Eg:-int x=1; or  int x;  x=1;      ...
 
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