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C++ Data Types
course content

Course Content

C++ Data Types

C++ Data Types

1. Introduction
OverviewArithmetic OperationsDivision int and doubleStandard MathSpecifying a Type
2. Numerical Data Types
Overview of Integer TypesApplications of Integer TypesType Modifiers for VariablesWorking with Floating-Point NumbersDouble-Precision Numbers
3. Text Data Type
Character Data TypeString Data TypeAccessing and Manipulating String ElementsCommon String MethodsString Manipulation PracticeSearching Within Strings
4. Other Data Types and Concepts
Boolean Data TypeBoolean ExpressionsVoid Data TypeAutomatic Type DeductionUnsigned Data TypesImplicit Type ConversionExplicit Type Conversion

bookUnsigned Data Types

To represent a number in the binary system, it is necessary to store both its value and sign. One bit is dedicated to storing the sign, while the remaining bits are used to store the numerical value. The sign bit stores:

  • 0 if the number is non-negative;
  • 1 if the number is negative.

If we are certain that our variable can only hold non-negative numbers, we can utilize the unsigned type modifier. This modifier enables the storage of values without considering the sign.

Moreover, due to the increased memory available for storing the value, the range of possible values is wider; however, negative numbers are not included within this range. Therefore, the allowed ranges are as follows:

cpp

main

copy

              
12345678910

            
#include <iostream>

int main()
{
	unsigned int total_vehicles = 1446000000;
	unsigned short age = 21;
  
	std::cout << total_vehicles << std::endl;
	std::cout << age << std::endl;
}

Note

Additionally, there is a signed type modifier available to indicate that a data type can accommodate both positive and negative numbers. But all numerical data types by default are signed, so there is no need to specify it explicitly.

Be sure to use unsigned only when the variable can not take negative numbers.
Assigning a negative value to an unsigned variable will not produce any errors, but the resulting value will be incorrect.

Task
test

Swipe to show code editor

  1. Assign the value -10 to the variable of any data type with an unsigned modifier.
  2. Print this variable using the std::cout.

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Section 4. Chapter 5
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bookUnsigned Data Types

To represent a number in the binary system, it is necessary to store both its value and sign. One bit is dedicated to storing the sign, while the remaining bits are used to store the numerical value. The sign bit stores:

  • 0 if the number is non-negative;
  • 1 if the number is negative.

If we are certain that our variable can only hold non-negative numbers, we can utilize the unsigned type modifier. This modifier enables the storage of values without considering the sign.

Moreover, due to the increased memory available for storing the value, the range of possible values is wider; however, negative numbers are not included within this range. Therefore, the allowed ranges are as follows:

cpp

main

copy

              
12345678910

            
#include <iostream>

int main()
{
	unsigned int total_vehicles = 1446000000;
	unsigned short age = 21;
  
	std::cout << total_vehicles << std::endl;
	std::cout << age << std::endl;
}

Note

Additionally, there is a signed type modifier available to indicate that a data type can accommodate both positive and negative numbers. But all numerical data types by default are signed, so there is no need to specify it explicitly.

Be sure to use unsigned only when the variable can not take negative numbers.
Assigning a negative value to an unsigned variable will not produce any errors, but the resulting value will be incorrect.

Task
test

Swipe to show code editor

  1. Assign the value -10 to the variable of any data type with an unsigned modifier.
  2. Print this variable using the std::cout.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 4. Chapter 5
toggle bottom row

bookUnsigned Data Types

To represent a number in the binary system, it is necessary to store both its value and sign. One bit is dedicated to storing the sign, while the remaining bits are used to store the numerical value. The sign bit stores:

  • 0 if the number is non-negative;
  • 1 if the number is negative.

If we are certain that our variable can only hold non-negative numbers, we can utilize the unsigned type modifier. This modifier enables the storage of values without considering the sign.

Moreover, due to the increased memory available for storing the value, the range of possible values is wider; however, negative numbers are not included within this range. Therefore, the allowed ranges are as follows:

cpp

main

copy

              
12345678910

            
#include <iostream>

int main()
{
	unsigned int total_vehicles = 1446000000;
	unsigned short age = 21;
  
	std::cout << total_vehicles << std::endl;
	std::cout << age << std::endl;
}

Note

Additionally, there is a signed type modifier available to indicate that a data type can accommodate both positive and negative numbers. But all numerical data types by default are signed, so there is no need to specify it explicitly.

Be sure to use unsigned only when the variable can not take negative numbers.
Assigning a negative value to an unsigned variable will not produce any errors, but the resulting value will be incorrect.

Task
test

Swipe to show code editor

  1. Assign the value -10 to the variable of any data type with an unsigned modifier.
  2. Print this variable using the std::cout.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

To represent a number in the binary system, it is necessary to store both its value and sign. One bit is dedicated to storing the sign, while the remaining bits are used to store the numerical value. The sign bit stores:

  • 0 if the number is non-negative;
  • 1 if the number is negative.

If we are certain that our variable can only hold non-negative numbers, we can utilize the unsigned type modifier. This modifier enables the storage of values without considering the sign.

Moreover, due to the increased memory available for storing the value, the range of possible values is wider; however, negative numbers are not included within this range. Therefore, the allowed ranges are as follows:

cpp

main

copy

              
12345678910

            
#include <iostream>

int main()
{
	unsigned int total_vehicles = 1446000000;
	unsigned short age = 21;
  
	std::cout << total_vehicles << std::endl;
	std::cout << age << std::endl;
}

Note

Additionally, there is a signed type modifier available to indicate that a data type can accommodate both positive and negative numbers. But all numerical data types by default are signed, so there is no need to specify it explicitly.

Be sure to use unsigned only when the variable can not take negative numbers.
Assigning a negative value to an unsigned variable will not produce any errors, but the resulting value will be incorrect.

Task
test

Swipe to show code editor

  1. Assign the value -10 to the variable of any data type with an unsigned modifier.
  2. Print this variable using the std::cout.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 4. Chapter 5
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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