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Hello welcome to this tutorial on the mad module when writing Python programs.

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We might have to perform mathematical operations frequently.

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Say for example calculating the square root of a number are finding the factorial of a number etc..

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Python provides the standard library that simplifies the programming process and removes the need to

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read write commonly used functions are operations.

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The python standard library is a collection of modules accessible from other programs.

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The libraries are modules provide us with useful data types functions and tools.

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So if we make of a program's use the existing library module the development process will be much more

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comfortable and great and the python library is part of a very standard Python installation.

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And if you want to use these library modules you need to call them or import them into your python programs.

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You need to have what is known as an import statement in your program in order to access the functions

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or are other tools or data types defined in these modules.

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In this tutorial we're going to discuss about the map module and we will see how to access the functions

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defined in this module.

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The math module provides a lot of useful functions that we will now see in order to access these functions

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and the tools.

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Defying any math module we need to import this module and this is this statement the import statement

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that we need to put in our python program in order to access these functions in this module.

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Now say for example you want to access a method name Eskew Artie.

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This is the method name is Q. Artie and this method our function is used to get the square root of a

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number.

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And this function is defined in the math module.

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Now in order to access this function in your program you need to use the dot operator so mad dot function

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name and you specify the number here.

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So for example a you pass it as an argument see the dot notation is a way we connect the name of the

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object in a our case it is the math module to the name of the method.

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It can perform the math module has by as a constant.

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That can be used in mathematical calculations such as calculating the area of a circle.

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Now in order to access this the constant pi from our python programs you can use the dot notation here

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as well.

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So you're going to access this constant by using the dot notation like this so we will now see how we

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can access the functions from our Jupiter notebook or the python programs so in order to access the

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math module we need to first import this module into our programs.

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For this we use the import statement.

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We are going to have a detailed discussion on import statements in the coming up sessions.

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So for now in order to access any of these standard libraries the python standard libraries you can

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use the import statement like this and then execute this line in order to see the contents of the library

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module man.

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We can use the help function to let us pass the math module to the help function.

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So here you see the list of the different functions and tools that are available in this module.

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Now let's access some of these functions from our python program Firstly let us access the constant

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pi from our program using the dot notation.

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So here is the value of the content by next.

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Let's call the function square root as you are d default name and let's pass an argument to this function.

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Sixteen so here.

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This function in the math module has calculated the square root of the number and return the result.

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We can also calculate the factorial of a number using the function factorial defined in the math module.

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So let's pass the argument 5 to this function and then execute this line.

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And this function has returned the value 120 it is the factorial of the integer value 5.

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Now let's call two functions that are related to rounding the same function and the flawed function.

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They still function returns the next integer bigger than the given number.

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So in other words the method sealed returns the smallest integer bigger than the given number.

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So let's execute this line and see the result.

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So it has returned the next integer bigger than this number minus 2.

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Next we will pass a positive another floating point about the dot 0 5 to this function C though the

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value return now is 4 because 4 is a next integer which is bigger than 3 4 4 5.

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Now let's call the function Lord and pass a floating point number.

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The flawed method returns the next integer smaller than the given number.

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And next let's call the F A B S function which returns the absolute value of a number.

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Let's parse this number to the to this function if Fabius and execute and this returns the absolute

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value of a number.