//variables in C //variable: A name given to a memory location is called variable //declaring variable: type variable_name; //rules for defining a variable in C /*1. can contain alphabets, digits and underscore(_) 2. a variable name can start with an alphabet and underscore only 3. can't start with a digit 4. whie space and reserved words are not allowed to give name of a variable */ //Data types in C /*1. basic data type: int, char, float, double 2. derived data type: this type of data types are created or derived by using basic data types array, pointers, structure, union 3. enumeration data type: emum 4. void data type: void */ #include <stdio.h> int main () { printf ( " %lu " , s...
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