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Keyword

Keyword:
            The words that are used by the language for special purpose are called keywords.These are also called reserved words

For example:
                 C++ programming the word main is used to indicate the starting of program ,include is used to add header files,int to declare an integer type variable. All these words are keywords of c++
 
   The keywords cannot b used as variable names in a program.

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Programs

PROGRAM 1: #include<iostream> using namespace std; int main() {    cout<<"HELLO WORLD";    return 0; } OUTPUT OF THE PROGRAM: HELLO WORLD                 ............................................................................................................................. PROGRAM 2: #include<iostream> using namespace std; int main() {    cout<<"c++ is best language";    return 0; } OUTPUT OF THE PROGRAM: c++ is best language      .............................................................................................................................                    

Initialization Of Variables

Initialization Of Variables:   When a variable is declared,a memory location is assigned to it.The value in that memory location is  also assigned to the variable.This preassigned value of a variable,if not used by mistake,may result in incorrect result.To avoid this situation, a known value is  assigned to the variable.This value is assigned to the variable at the time of its declaration.Assigning a known value to a variable at the time of its declaration is called initializing of the variable.        For example, to declare variables a,b and c of integer type and assigning values a=220 and b=70,the statement is written as:            int a=220,b=70,c;