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2 Building and Installing Erlang/OTP 2.1 Introduction. This document describes how to build and install Erlang/OTP-23. Erlang/OTP should be possible to build from source on. I am trying to compile the full Erlang package from source code on a Mac running Lion. The source code is latest release (R14B04). After $./configure I got the following: wx: Can not combine 64bits erlang with wxWidgets on MacOSX, wx will not be useable So, I figured that the wxWidgets installed on my computer is 32bits. And one possible.
The Erlang C formula is a mathematical equation for calculating the number of agents (advisors) that you need in a call centre, given the number of calls and the service level that you want to achieve. The Erlang C formula is the most important part of the equation. Getting Erlang documentation. Erlang may come with documentation included (as man pages, pdfs and html files). This allows typing erl -man mnesia to get info on mnesia module. Asdf-erlang uses kerl for builds, and kerl is capable of building the docs for specified version of Erlang. For kerl to be able to build Erlang documentation two requirements have to be met. Using a standard Erlang installation from brew anything that calls crypto crashes on 10.13 because dynamic linking is hitting Apples modified version of BoringSSL instead of LibreSSL or OpenSSL. I have tried compiling with the following flags:-disable-dynamic-ssl-lib -with-ssl=#Formula.
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In Erlang there are 2 types of numeric literals which are integers and floats. Following are some examples which show how integers and floats can be used in Erlang.
Integer − An example of how the number data type can be used as an integer is shown in the following program. This program shows the addition of 2 Integers.
Example
The output of the above program will be as follows −
Output
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Float − An example of how the number data type can be used as a float is shown in the following program. This program shows the addition of 2 Integers.
Example
The output of the above program will be as follows −
Output
Displaying Float and Exponential Numbers
When using the fwrite method to output values to the console, there are formatting parameters available which can be used to output numbers as float or exponential numbers. Let’s look at how we can achieve this.
Example
The output of the above program will be as follows −
Output
The following key things need to be noted about the above program −
- When the ~f option is specified it means that the argument is a float which is written as [-]ddd.ddd, where the precision is the number of digits after the decimal point. The default precision is 6.
- When the ~e option is specified it means that the argument is a float which is written as [-]d.ddde+-ddd, where the precision is the number of digits written. The default precision is 6.
Mathematical Functions for Numbers
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The following mathematical functions are available in Erlang for numbers. Note that all the mathematical functions for Erlang are present in the math library. So all of the below examples will use the import statement to import all the methods in the math library.
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Sr.No. | Mathematical Functions & Description |
---|---|
1 | This method returns the sine of the specified value. |
2 | This method returns the cosine of the specified value. |
3 | This method returns the tangent of the specified value. |
4 | The method returns the arcsine of the specified value. |
5 | The method returns the arccosine of the specified value. |
6 | The method returns the arctangent of the specified value. |
7 | exp The method returns the exponential of the specified value. |
8 | The method returns the logarithmic of the specified value. |
9 | The method returns the absolute value of the specified number. |
10 | The method converts a number to a float value. |
11 | The method checks if a number is a float value. |
12 | The method checks if a number is a Integer value. |