1. Computer Programming LAB 1 Tejalal Choudhary Asst. Prof, CSE Dept.

2. Contents Flow Chart Algorithm History of “C” Programming Language
Character set
Comments
Keywords
Compilation and execution

3. Algorithm
An algorithm is a sequence of instructions to solve a particular problem in finite number of steps.
In mathematics and computer science, an algorithm is a self-contained step-by-step set of operations to be performed.
It is a problem solving technique.
Algorithm: Addition of two numbers
Step 1 : START
Step 2 : DECLARE VARIABLES
Step 3 : READ VALUE OF VARIABLES
Step 4 : CALCULATE SUM AS
SUM = A+B
Step 5 : DISPLAY SUM
Step 6 : END

4. Flow Chart
It is a diagrammatic representation that illustrates the sequence of operations to be performed to get the solution of a problem.
Flowcharts are drawn in the early stages of formulating computer solutions.
Flowcharts facilitate communication between programmers and business people.
The flowchart is drawn according to defined rules
and using standard flowchart symbols prescribed by the American National Standard Institute, Inc.

5. Flow Chart Symbols

6. Sample flow chart

7. Flow chart for sum of 2 numbers

8. History of C
C is a programming language developed at AT & T’s Bell Laboratories of USA in 1972.
It was designed and written by Dennis Ritchie.
It is a general purpose programming language
used in development of system software and application software.

9. Character Set
Any alphabet, digit or special symbol used to represent information
Alphabets
Digits
Symbols

10. Comments
Single line //this is a comment Multi line /* this is a comment */

11. Keywords Also known as reserved words
Meaning is already known to compiler
Can not be used as user defined names