Let Us C by Yashavant P. Kanetkar β Introduction part 1.
Contents
  Let Us C by Yashavant P. Kanetkar β Introduction (Part 1)
(Based on the bookβs early chapters and philosophy)
βLet Us Cβ is one of the most popular books to learn C Programming Language, especially for beginners in India. Written in a simple and student-friendly way, the book helps you start programming from scratch.
  Part 1: Introduction to C Programming
  Why Learn C?
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Foundation of programming β Languages like C++, Java, Python are based on C.
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Fast & powerful β Gives close access to system resources.
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Used in system software β Operating systems, embedded systems, compilers, etc.
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Taught in colleges β Core part of engineering and computer science curriculum.
 
  History of C Language:
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Developed by Dennis Ritchie at AT&T Bell Labs in 1972.
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Based on earlier languages: B and BCPL.
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Used to develop UNIX OS, making it highly practical.
 
  Kanetkarβs Philosophy in βLet Us Cβ:
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Simple language, practical examples.
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Focus on problem-solving and concept clarity, not just theory.
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Designed for self-learners and students with no programming background.
 
  What You Learn in the First Chapter:
  1. What is C?
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A structured, procedural programming language.
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Good for logic-building and understanding how computers work.
 
  2. Steps to Write and Run a C Program:
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Write code (
.cfile) - 
Compile it (convert into machine language)
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Run the executable
 
  3. First C Program (Hello World)
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#include <stdio.h>β tells the compiler to use standard input/output functions. - 
main()β every C program starts withmain(). - 
printf()β used to print output. - 
return 0;β ends the program successfully. 
  What You Need to Start Practicing:
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A C compiler: Turbo C, GCC, or online compilers like:
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www.onlinegdb.com
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replit.com
 
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  What Comes Next?
In the following chapters, youβll learn about:
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Variables, Data Types
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Operators & Expressions
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Control Flow (if, for, while)
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Functions and Arrays
 
  Summary:
| Topic | What You Learn | 
|---|---|
| C Basics | History, importance, structure | 
| First Program | Syntax, output, structure | 
| Practice | Start writing and compiling code | 
Would you like me to guide you through Chapter 2: C Instructions, or create exercises with solutions based on βLet Us Cβ?