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C++ Data Types
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C++ Data Types

C++ Data Types

1. Introduction
OverviewArithmetic OperationsDivision int and doubleMath in C++Specifying a Type
2. Numerical Data Types
IntegersUsing IntegersType modifierFloatDoubleNumerical Data Types Summary
3. Text Data Type
CharStringIndexing a StringWorking With StringChanging The String PracticeFinding Text in a StringStrings in Memory
4. Other Data Types and Concepts
BooleanBoolean ExpressionsVoidAuto UnsignedImplicit Type ConversionExplicit Type Conversion

bookMath in C++

In addition to the +, -, *, /, and % operations, we can perform many more mathematical operations using functions from the <cmath> library. Here is a table of the most used ones:

Don't forget to include the library using the following line:

Here is an example of using each of the functions mentioned above:

cpp

main

copy

              
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#include <iostream>
#include <cmath>

int main()
{
    std::cout << "cos(0) = " << cos(0) << std::endl;
    std::cout << "sin(0) = " << sin(0) << std::endl;
    std::cout << "tanh(pi/4) = " << tan(M_PI/4) << std::endl;
    std::cout << "exp(1) = " << exp(1) << std::endl;
    std::cout << "log(e) = " << log(M_E) << std::endl;
    std::cout << "pow(2, 3) = " << pow(2, 3) << std::endl;
    std::cout << "sqrt(4) = " << sqrt(4) << std::endl;
    std::cout << "cbrt(8) = " << cbrt(8) << std::endl;
    std::cout << "ceil(7.8) = " << ceil(7.8) << std::endl;
    std::cout << "floor(7.8) = " << floor(7.8) << std::endl;
    std::cout << "round(7.8) = " << round(7.8) << std::endl;
}

Note

Constants M_PI and M_E for value of π (3.1415...) and e (2.7183...) are also defined in the <cmath> library.

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