Variables and Programming

Variables and Programming:

Program: set of instruction is called Program.

Programming Language: It is used to communicate with the computers.

There are so many programming languages are available in the software market, like: c, c++, Java, Python,…….etc

1.   Procedure oriented or structured oriented(C..)

2.   Non-procedure oriented programming languages /Object oriented Programming language

C++, Java,…python….these are used to develop application(Softwares/Apps)

SQL (Structured Query Language) Which is used to access/communicate with data base servers.

Algorithms:

Which gives the solution to the problem in step by step procedure using our own language (like simple English). It is part of software designing phase. 

An Algorithm explains the requirement/problem that how to solve the problem systematically to get the desired output.

Mainly we follow the following steps to design the algorithms

Step1: start

Step2: declaration

Step3: input

Step4: Logic/Formula

Step5: output

Step6: end/stop

Step1: start

Which represents beginning of the algorithm

Step2: declaration

Variable declarations

Step 3: Input

Taking input from the user

Step 4: Logic

The required logic is generated in this step

Step 5: output

It displays the output

Step 6: stop:

It indicates that end of the algorithm

Example algorithms:

Whether the given number is even or odd:

Step 1: we are testing the value for even or odd

Step2: variable declaration

Take one integer variable ‘a’

Step 3: input

Ask the user to read the value and store into integer variable ‘a’

Step 4: Logic:

Test the values is divisible by 2?

Step 5: output:

If the step 4 condition is true, then display the variable ‘a’ is Even number, odd otherwise

Step 6: stop

End of the algorithm.

SQL for creating the employee table in the data base:

CREATE TABLE EMP(

EMPID int,

Ename varchar(255),

Desg varchar(15)

);

EMPID	ENAME	DESG

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