Built-in Random Variables

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The tutorial consists of more than 200 live examples from 50 sections given separately for JAVA, C# and C++. Each of the examples can be copied and run on your own environment. In addition, mXparser provides an extensive collection of over 500 built-in math functions, expressions and symbols. Familiarize yourself with the scope and the syntax. Live testing is the best way to learn. Good luck! 🙂

Tutorial Math Collection API spec Download

Below is the code for JAVA, C# (the code for C# is almost identical) and C++. To copy the code, double-click inside the frame.

Case 1: Random integer

Java/C# code
// JAVA: import org.mariuszgromada.math.mxparser.*;
// C#: using org.mariuszgromada.math.mxparser;
// ...
Expression e = new Expression("[Int]");

mXparser.consolePrintln("Res. 1: " + e.getExpressionString() + " = " + (int)e.calculate());
mXparser.consolePrintln("Res. 2: " + e.getExpressionString() + " = " + (int)e.calculate());
C++ code
#include "org/mariuszgromada/math/mxparser.hpp"
// ...
ExpressionPtr e = new_Expression("[Int]");

mXparser::consolePrintln("Res. 1: " + e->getExpressionString() + " = " + (int)e->calculate());
mXparser::consolePrintln("Res. 2: " + e->getExpressionString() + " = " + (int)e->calculate());
Code result
[mXparser-v.5.2.1] Res. 1: [Int] = -421216764
[mXparser-v.5.2.1] Res. 2: [Int] = 859703054

Case 2: Random integer N: -10^k <= N <= 10^k for k = 1, 2, …,9

Java/C# code
// JAVA: import org.mariuszgromada.math.mxparser.*;
// C#: using org.mariuszgromada.math.mxparser;
// ...

/* -100 <= N <= 100 */
Expression e2 = new Expression("[Int2]");

mXparser.consolePrintln("Res. 1: " + e2.getExpressionString() + " = " + e2.calculate());
mXparser.consolePrintln("Res. 2: " + e2.getExpressionString() + " = " + e2.calculate());

/* -100000 <= N <= 100000 */
Expression e5 = new Expression("[Int5]");

mXparser.consolePrintln("Res. 3: " + e5.getExpressionString() + " = " + e5.calculate());
mXparser.consolePrintln("Res. 4: " + e5.getExpressionString() + " = " + e5.calculate());
C++ code
#include "org/mariuszgromada/math/mxparser.hpp"
// ...
/* -100 <= N <= 100 */
ExpressionPtr e2 = new_Expression("[Int2]");

mXparser::consolePrintln("Res. 1: " + e2->getExpressionString() + " = " + e2->calculate());
mXparser::consolePrintln("Res. 2: " + e2->getExpressionString() + " = " + e2->calculate());

/* -100000 <= N <= 100000 */
ExpressionPtr e5 = new_Expression("[Int5]");

mXparser::consolePrintln("Res. 3: " + e5->getExpressionString() + " = " + e5->calculate());
mXparser::consolePrintln("Res. 4: " + e5->getExpressionString() + " = " + e5->calculate());
Code result
[mXparser-v.5.2.1] Res. 1: [Int2] = 92.0
[mXparser-v.5.2.1] Res. 2: [Int2] = 94.0
[mXparser-v.5.2.1] Res. 3: [Int5] = 50442.0
[mXparser-v.5.2.1] Res. 4: [Int5] = -76163.0

Case 3: Random natural number

Java/C# code
// JAVA: import org.mariuszgromada.math.mxparser.*;
// C#: using org.mariuszgromada.math.mxparser;
// ...

/* Including 0 */
Expression e1 = new Expression("[nat]");

mXparser.consolePrintln("Res. 1: " + e1.getExpressionString() + " = " + (int)e1.calculate());
mXparser.consolePrintln("Res. 2: " + e1.getExpressionString() + " = " + (int)e1.calculate());

/* Excluding 0 */
Expression e2 = new Expression("[Nat]");

mXparser.consolePrintln("Res. 3: " + e2.getExpressionString() + " = " + (int)e2.calculate());
mXparser.consolePrintln("Res. 4: " + e2.getExpressionString() + " = " + (int)e2.calculate());
C++ code
#include "org/mariuszgromada/math/mxparser.hpp"
// ...

/* Including 0 */
ExpressionPtr e1 = new_Expression("[nat]");

mXparser::consolePrintln("Res. 1: " + e1->getExpressionString() + " = " + (int)e1->calculate());
mXparser::consolePrintln("Res. 2: " + e1->getExpressionString() + " = " + (int)e1->calculate());

/* Excluding 0 */
ExpressionPtr e2 = new_Expression("[Nat]");

mXparser::consolePrintln("Res. 3: " + e2->getExpressionString() + " = " + (int)e2->calculate());
mXparser::consolePrintln("Res. 4: " + e2->getExpressionString() + " = " + (int)e2->calculate());
Code result
[mXparser-v.5.2.1] Res. 1: [nat] = 1659809708
[mXparser-v.5.2.1] Res. 2: [nat] = 1259835535
[mXparser-v.5.2.1] Res. 3: [Nat] = 248106924
[mXparser-v.5.2.1] Res. 4: [Nat] = 1953526897

Case 4: Random natural number N <= 10^k for k = 1, 2, …,9

Java/C# code
// JAVA: import org.mariuszgromada.math.mxparser.*;
// C#: using org.mariuszgromada.math.mxparser;
// ...

/* Including 0: 0 <= N < 10 */
Expression e1 = new Expression("[nat1]");

mXparser.consolePrintln("Res. 1: " + e1.getExpressionString() + " = " + (int)e1.calculate());
mXparser.consolePrintln("Res. 2: " + e1.getExpressionString() + " = " + (int)e1.calculate());

/* Excluding 0: 0 < N < 1000 */
Expression e2 = new Expression("[Nat3]");

mXparser.consolePrintln("Res. 3: " + e2.getExpressionString() + " = " + (int)e2.calculate());
mXparser.consolePrintln("Res. 4: " + e2.getExpressionString() + " = " + (int)e2.calculate());
C++ code
#include "org/mariuszgromada/math/mxparser.hpp"
// ...

/* Including 0: 0 <= N < 10 */
ExpressionPtr e1 = new_Expression("[nat1]");

mXparser::consolePrintln("Res. 1: " + e1->getExpressionString() + " = " + (int)e1->calculate());
mXparser::consolePrintln("Res. 2: " + e1->getExpressionString() + " = " + (int)e1->calculate());

/* Excluding 0: 0 < N < 1000 */
ExpressionPtr e2 = new_Expression("[Nat3]");

mXparser::consolePrintln("Res. 3: " + e2->getExpressionString() + " = " + (int)e2->calculate());
mXparser::consolePrintln("Res. 4: " + e2->getExpressionString() + " = " + (int)e2->calculate());
Code result
[mXparser-v.5.2.1] Res. 1: [nat1] = 10
[mXparser-v.5.2.1] Res. 2: [nat1] = 0
[mXparser-v.5.2.1] Res. 3: [Nat3] = 90
[mXparser-v.5.2.1] Res. 4: [Nat3] = 51

Case 5: Uniform continuous distribution U(0,1)

Java/C# code
// JAVA: import org.mariuszgromada.math.mxparser.*;
// C#: using org.mariuszgromada.math.mxparser;
// ...
Expression e = new Expression("[Uni]");

mXparser.consolePrintln("Res. 1: " + e.getExpressionString() + " = " + e.calculate());
mXparser.consolePrintln("Res. 2: " + e.getExpressionString() + " = " + e.calculate());
C++ code
#include "org/mariuszgromada/math/mxparser.hpp"
// ...
ExpressionPtr e = new_Expression("[Uni]");

mXparser::consolePrintln("Res. 1: " + e->getExpressionString() + " = " + e->calculate());
mXparser::consolePrintln("Res. 2: " + e->getExpressionString() + " = " + e->calculate());
Code result
[mXparser-v.5.2.1] Res. 1: [Uni] = 0.9203947484394417
[mXparser-v.5.2.1] Res. 2: [Uni] = 0.27088514104678163

Case 6: Normal distribution N(0,1)

Java/C# code
// JAVA: import org.mariuszgromada.math.mxparser.*;
// C#: using org.mariuszgromada.math.mxparser;
// ...
Expression e = new Expression("[Nor]");

mXparser.consolePrintln("Res. 1: " + e.getExpressionString() + " = " + e.calculate());
mXparser.consolePrintln("Res. 2: " + e.getExpressionString() + " = " + e.calculate());
C++ code
#include "org/mariuszgromada/math/mxparser.hpp"
// ...
ExpressionPtr e = new_Expression("[Nor]");

mXparser::consolePrintln("Res. 1: " + e->getExpressionString() + " = " + e->calculate());
mXparser::consolePrintln("Res. 2: " + e->getExpressionString() + " = " + e->calculate());
Code result
[mXparser-v.5.2.1] Res. 1: [Nor] = 0.33914374337258346
[mXparser-v.5.2.1] Res. 2: [Nor] = 0.2480653909819784
Nuget – Package Manager (C#, F#, Visual Basic, …)

Install-Package MathParser.org-mXparser-Version 6.1.1

Nuget – .NET CLI

dotnet add package MathParser.org-mXparser--version 6.1.1

Nuget – Package Reference

<PackageReference Include="MathParser.org-mXparser"Version="6.1.1"/>

Maven – Dependency (Java, Kotlin, Scala, Groovy, …)

<dependency>
<groupid>org.mariuszgromada.math</groupid>
<artifactid>MathParser.org-mXparser</artifactid>
<version>6.1.1</version>
</dependency>

Maven – Gradle

implementation 'org.mariuszgromada.math:MathParser.org-mXparser:6.1.1'

CMake – Dependency / FetchContent (C++, MSVC, LLVM/Clang, GNU/GCC, MinGW, MSYS2, WSL, Windows, Linux, Unix, MacOS)

include(FetchContent)
FetchContent_Declare(
MathParserOrgMxParser
GIT_REPOSITORY https://github.com/mariuszgromada/MathParser.org-mXparser.git
GIT_TAG v.6.1.1
SOURCE_SUBDIR CURRENT/cpp/lib
)
FetchContent_MakeAvailable(MathParserOrgMxParser)
mxparser_link(YourExecutable)

GitHub

git clone https://github.com/mariuszgromada/MathParser.org-mXparser

OTHER DOWNLOAD OPTIONS

Download latest release – v.6.1.0 Sagitara: .NET bin onlyDownload latest release – v.6.1.0 Sagitara: JAVA bin onlyDownload latest release – v.6.1.0 Sagitara: bin + doc

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SOURCE CODE

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