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C Basics
course content

Kursusindhold

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

book
If-else Operator

if-else

The if-else statement is a staple in programming. It enables you to direct the flow of your program based on certain conditions.

Note

Just a heads-up! Code blocks { } were introduced in Section 1, Chapter 2.

The if-else structure is pretty straightforward:

Take, for instance, the temperature variable that receives data from a temperature sensor.

Suppose we want a program that alerts us when the temperature gets too high:

Main.c

Main.c

copy

              
123456789101112131415161718

            
#include <stdio.h>

int main()
{
	int temperature = 200; // in celsius

	if (temperature > 80) 
	{
		printf("Temperature is so high: %d degrees Celsius\n", temperature);
	}

	else
	{
		printf("Temperature is normal: %d degrees Celsius\n", temperature);
	}

	return 0;
}

You can incorporate multiple if statements in a program, especially when you need to evaluate various conditions.

Note

Conditions can also include logical operators.

Else If

The if-else statement can be further expanded with else-if:

Main.c

Main.c

copy

              
12345678910111213141516171819202122232425262728

            
#include <stdio.h>

int main()
{
	int tempereture = 50; // in celsius

	if (tempereture > 50) // condition 1
	{
		printf("Temperature is high: %d degrees Celsius\n", tempereture); // instruction_1
	}

	else if (tempereture > 100)// condition 2
	{
		printf("Temperature is so high: %d degrees Celsius\n", tempereture);// instruction_2
	}

	else if (tempereture > 150)// condition 3
	{
		printf("Temperature is critically high: %d degrees Celsius\n", tempereture);// instruction_3
	}

	else
	{
		printf("Temperature is normal: %d degrees Celsius\n", tempereture); // instruction_4
	}

	return 0;
}

1. What is the purpose of an if-else statement in programming?

2. What is a basic structure of an if-else statement in C, including the syntax for code blocks.

question mark

What is the purpose of an if-else statement in programming?

Select the correct answer

question mark

What is a basic structure of an if-else statement in C, including the syntax for code blocks.

Select the correct answer

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Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 4. Kapitel 1

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course content

Kursusindhold

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

book
If-else Operator

if-else

The if-else statement is a staple in programming. It enables you to direct the flow of your program based on certain conditions.

Note

Just a heads-up! Code blocks { } were introduced in Section 1, Chapter 2.

The if-else structure is pretty straightforward:

Take, for instance, the temperature variable that receives data from a temperature sensor.

Suppose we want a program that alerts us when the temperature gets too high:

Main.c

Main.c

copy

              
123456789101112131415161718

            
#include <stdio.h>

int main()
{
	int temperature = 200; // in celsius

	if (temperature > 80) 
	{
		printf("Temperature is so high: %d degrees Celsius\n", temperature);
	}

	else
	{
		printf("Temperature is normal: %d degrees Celsius\n", temperature);
	}

	return 0;
}

You can incorporate multiple if statements in a program, especially when you need to evaluate various conditions.

Note

Conditions can also include logical operators.

Else If

The if-else statement can be further expanded with else-if:

Main.c

Main.c

copy

              
12345678910111213141516171819202122232425262728

            
#include <stdio.h>

int main()
{
	int tempereture = 50; // in celsius

	if (tempereture > 50) // condition 1
	{
		printf("Temperature is high: %d degrees Celsius\n", tempereture); // instruction_1
	}

	else if (tempereture > 100)// condition 2
	{
		printf("Temperature is so high: %d degrees Celsius\n", tempereture);// instruction_2
	}

	else if (tempereture > 150)// condition 3
	{
		printf("Temperature is critically high: %d degrees Celsius\n", tempereture);// instruction_3
	}

	else
	{
		printf("Temperature is normal: %d degrees Celsius\n", tempereture); // instruction_4
	}

	return 0;
}

1. What is the purpose of an if-else statement in programming?

2. What is a basic structure of an if-else statement in C, including the syntax for code blocks.

question mark

What is the purpose of an if-else statement in programming?

Select the correct answer

question mark

What is a basic structure of an if-else statement in C, including the syntax for code blocks.

Select the correct answer

Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 4. Kapitel 1
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