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In Python they don't have to declare these types of debatable ahead of time like we do in DC.

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Language the interpreter automatically detects the type of the variable by the data it contains in order

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to assign a value to a variable B use d equals sign here which is known as the assignment operator and

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if you try to access a variable that has not been assigned a value the program draws an error.

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So let's see this in the python share here in the python shell.

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I will try to squirt a ready bill that has not been assigned a value and see what is going to happen

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here.

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So I would say X days to the power all two and then hit enter so the program has thrown an error saying

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name X is non defined.

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So this means Python encounters a name or a variable that it does not recognize and this is the reason

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we get the name error the next topic that we want to discuss is simultaneous assignment.

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Python allows simultaneous assignments and the syntax is something like this and this statement dated

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Python to evaluate all of the expressions on the right hand side and then assign them to the corresponding

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variables on the left.

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So let us now see an example in the python shell.

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Let us now define two variables x and y so X comma Y equal to four.

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Fine hit in dirt.

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Now let's see what value the red X contains more than Y is five and simultaneous assignments odd helpful

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to swap y lose all two variables.

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Say for example if we want to swap the values into variables x and y you could do something like this.

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Get them to put on a T.

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What value does X contain X has five.

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What would y y contains for.

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Yeah do the arithmetic operators that we use in python like addition subtraction multiplication modulo

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exponent flawed division set of if you try to divide number by 0.

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Python raises and edit and the script is interrupted so let's say we try to do Y number 20 by 0.

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As you can see here Python has raised and added zero division it has raised instead of just showing

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the message exception needed Python dictated what type of exception it was encountered in our case it

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is zero division.

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Edit and Python comes with wedges built and exceptions as well as the possibility to create self defined

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exceptions.

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Until now we have discussed about various arithmetic operators such as addition subtraction division

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flawed division etc..

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That is not the.

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Arithmetic operator that which is known as the modulo operator and suppose you want to find the remainder

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then using division you can use the modulo operator.

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Say for example you want to divide the number nine by two.

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If you use the division operator you get the quotient.

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If you want to know the remainder use the modulo operator and the symbol for this is percentage sign.

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So 1 is the remainder when you divide 9 by 2 13 modulo offering 2 3.

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So here you get the domain to then using the modulo operator.