Question

1. If you would define a rule for creating a variable in C using regular expression, how would you write it?
2. If you need to skip statements in for or while loops and go to the next iteration, what statement will you use?
3. In respect to users and processes, how would you define Linux OS?

Answer 1

Variables in C Language

• Variables are the storage area of data or values.
• Users can easily access and change the values of variables.
• Users can give any name to a variable except the programming keywords.
• Users can also store different types of variable numbers, text, decimals, etc..

Syntax:

Datatypes variable name = value ;

E.g

int num = 115;

char Name = "A" ;

Steps:

1. Define the datatype(int,char, float etc...)
2. Give a name to the variable(num, name, sum, etc...)
3. Add values to the variable.

Skip statements in for or while loops and go to the next iteration

Continue statement ( can  be used to skip  loop iteration, continue process the next iteration of a for or while loop.

E.g

Skip a value and continue the iteration

int main()

{

for (int i = 1; i < 10; i++) {

// When i reaches 5 it automatically skip the 5 and continue to next iteration//

   if (i == 5)

     continue;

else

     cout << i << " ";

    }

return 0;

}

The output will be print : 1,2,3,4,6,7,8,9 except 5

Define Linux Operating System

• Linux is an open-source operating system which given access to source code, and the user can modify the operating system according to the requirements. It is a multiplatform operating system based on Linux Kernal.