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C Basics
course content

Contenu du cours

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
Logical Operators

Logical operators enable you to evaluate the truth of multiple expressions, establishing intricate and accurate conditions for your program.

Imagine you need to plot a point on a Cartesian coordinate system. You can only plot this point when you have both the x-coordinate and the y-coordinate. If even one of these coordinates is absent, the point can't be plotted.

We'll focus on three primary logical operators:

SymbolNameUsage ExampleDescription
&&ANDa && ba AND b
||ORa || ba OR b
!NOT!aNOT a

These operators return either true or false, depending on the given conditions.

With the introduction of the C99 standard, working with boolean data has become more straightforward thanks to the bool (or _Bool) data type. This data type can only hold two values: 1 (true) or 0 (false).

c

Main

copy

              
1234567891011121314151617

            
#include <stdio.h>

int main()
{
	int x = 45;
	int y = -4;

	/* Using AND operator: 
	if `x` and `y` equals `true` (exists)), 
	point will equal `1` */
	bool point = (x && y); // x = true AND y = true

	printf("Point exists, because x and y exists\n");
	printf("Result of expression equal: %d\n", point);

	return 0;
}

To provide more context:

c

Main

copy

              
1234567891011121314

            
#include <stdio.h>

int main()
{
	int x = 45;
	int y = 150;

	bool point = (x < 50 && y > 100); // (x < 50) AND (y > 100)

	printf("Is the expression logically correct?\n");
	printf("%d\n", point);

	return 0;
}

Logical operators really shine when used in conjunction with conditional statements and loops.

question mark

Arrange the logical operators in the specified order: &&, ||, !

Select the correct answer

Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 3. Chapitre 6

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course content

Contenu du cours

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
Logical Operators

Logical operators enable you to evaluate the truth of multiple expressions, establishing intricate and accurate conditions for your program.

Imagine you need to plot a point on a Cartesian coordinate system. You can only plot this point when you have both the x-coordinate and the y-coordinate. If even one of these coordinates is absent, the point can't be plotted.

We'll focus on three primary logical operators:

SymbolNameUsage ExampleDescription
&&ANDa && ba AND b
||ORa || ba OR b
!NOT!aNOT a

These operators return either true or false, depending on the given conditions.

With the introduction of the C99 standard, working with boolean data has become more straightforward thanks to the bool (or _Bool) data type. This data type can only hold two values: 1 (true) or 0 (false).

c

Main

copy

              
1234567891011121314151617

            
#include <stdio.h>

int main()
{
	int x = 45;
	int y = -4;

	/* Using AND operator: 
	if `x` and `y` equals `true` (exists)), 
	point will equal `1` */
	bool point = (x && y); // x = true AND y = true

	printf("Point exists, because x and y exists\n");
	printf("Result of expression equal: %d\n", point);

	return 0;
}

To provide more context:

c

Main

copy

              
1234567891011121314

            
#include <stdio.h>

int main()
{
	int x = 45;
	int y = 150;

	bool point = (x < 50 && y > 100); // (x < 50) AND (y > 100)

	printf("Is the expression logically correct?\n");
	printf("%d\n", point);

	return 0;
}

Logical operators really shine when used in conjunction with conditional statements and loops.

question mark

Arrange the logical operators in the specified order: &&, ||, !

Select the correct answer

Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 3. Chapitre 6
Nous sommes désolés de vous informer que quelque chose s'est mal passé. Qu'est-il arrivé ?
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