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C Basics

Essentials of C Program

Let's delve deeper into our introductory program:

c

Main.c

printf Function

The printf() function displays output on the screen. For our example, it shows the message "Hello, c<>definity!". Text meant for display should be wrapped in double quotes, like this:

Control Characters

Note

In C, \n is recognized as a single character, not two separate characters ("\" and "n").

The character sequence \n represents a newline. This means that any content following this sequence will appear on the next line.

c

Main.c

Throughout this course, we'll occasionally utilize the \t character for tabulation, which equates to a tab, or 4 spaces.

c

Main.c

The Semicolon

The semicolon ; signifies the end of a statement in C. Every statement in C should conclude with a ;. Think of it like the period at the end of a written sentence.

The Return Statement

return is the statement used to end a function and potentially return a value. In the context of the main function, the standard in C requires the use of return 0. While it has specific implications on UNIX systems, it generally indicates an "Exit status" or the successful termination of a program. We'll explore the return statement in greater depth as the course progresses.

Everything was clear?

Section 1. Chapter 2
course content

Course Content

C Basics

C Basics

1. Introduction

Structure of the C-ProgramEssentials of C ProgramHow to Run the Program?

2. Data

DataVariablesPrintfIntroduction to ArraysTwo Dimensional ArraysChar and StringSizeofPrintf PracticeSizeof Practice

3. Operators

Assignment, Comparison, Not Equal ToSum, Difference, Increment, DecrementMultiplication, Division and ModuloComparison OperatorsComparison Operators PracticeLogical OperatorsLogical Operators Practice

4. Control Statements

If-else Operatorif-else Operator PracticeTernary OperatorSwitch, BreakWhile, Do-WhileFor, ContinueFor Loop Practice

5. Functions

Structure of the FunctionDeclaration, Type and ReturnArgumentsPassing ArgumentsHeader, Prototypes Void, Recursion

6. Pointers

Pointers are around UsReferences and DereferencesPointersMalloc and FreeFunctions, Arrays and Two PointersVoid

Essentials of C Program

Let's delve deeper into our introductory program:

c

Main.c

printf Function

The printf() function displays output on the screen. For our example, it shows the message "Hello, c<>definity!". Text meant for display should be wrapped in double quotes, like this:

Control Characters

Note

In C, \n is recognized as a single character, not two separate characters ("\" and "n").

The character sequence \n represents a newline. This means that any content following this sequence will appear on the next line.

c

Main.c

Throughout this course, we'll occasionally utilize the \t character for tabulation, which equates to a tab, or 4 spaces.

c

Main.c

The Semicolon

The semicolon ; signifies the end of a statement in C. Every statement in C should conclude with a ;. Think of it like the period at the end of a written sentence.

The Return Statement

return is the statement used to end a function and potentially return a value. In the context of the main function, the standard in C requires the use of return 0. While it has specific implications on UNIX systems, it generally indicates an "Exit status" or the successful termination of a program. We'll explore the return statement in greater depth as the course progresses.

Everything was clear?

Section 1. Chapter 2
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