Dennis Ritchie and Ken Thompson developed the C language between 1969 and 1973 at Bell Labs to re-implement the UNIX operating system. The first C program example in K&R was "Hello, World!". C language includes lowercase and uppercase letters, decimal digits, and graphic characters in its character set and has 32 keywords. C is widely used today for system programming and website programming.

2. SOME HISTORY
Dennis Ritchie
1941-2011
Ken Thompson
1943 until now

3. CHARACTER SET
• Lowercase and uppercase letters: a–z A–Z
•Decimal digits: 0–9
•Graphic characters: ! " # % & ' ( ) * + , - . / : ; < = > ? [ ] ^ _

4. KEYWORDS
• 32 keywords

5. OPERATORS

6. “HELLO, WORLD”
• Appeared in the 1st edition of K&R as an example

7. USES
System programming
Website programming

8. RELATED LANGUAGES

9. STATISTIC

10. QUESTION:
When was C language developed?
Between 1969 and 1973

11. QUESTION:
Who were the developers of C language?
The developers of C language were Dennis
Ritchie and Ken Tompson.

12. QUESTION:
What was the original purpose of
developing C language?
C language was originally developed to
re-implement UNIX operating system.

13. QUESTION:
What character sets are included in C?
• Lowercase and uppercase letters: a–z, A–Z
• Decimal digits: 0–9
• Graphic characters: ! " # % & ' ( ) * + , - .
/ : ; < = > ? [ ] ^ _ { | } ~

14. QUESTION:
How many keywords are there in C
language?
There are 32 keywords in C language.

15. QUESTION:
How was named the first example program
appeared in K&R?
It was named “Hello, World!”

16. QUESTION:
Where is C language widely used
nowadays?
C is widely used for “system programming”
and website programming.

17. THANK YOU