Variables

Info:

In Python you can add variables in this way:

variable_name = value

The = is the assignment operator . In this syntax, you assign a value to the variable_name. The value can be anything like a number , a string , etc.., that you assign to the variable.

For example let's create a variable called name.

name = ("Garo")

As you see above, we have put the name Garo as a string to the variable. Here's an example of using this variable:

character_name = ("Garo")
character_age = ("38")
print("He is a man named " + character_name + ", ")
print("and he is " + character_age + " years old.")

So the program above will give this output

He is a man named Garo,
and he is 38 years old.

As you can see on the example above, we are adding the white space to the strings as you need to place the spacing into it, if you want to create a correctly formatted text.

Also you can see that our variables in the examples are called:

character_name
character_age

Because in the Python coding language, when you use multiple words, it is a good practice to seperate the words with an underscore to improve the readability.

Warning

You can't use some special characters like !,- in variable names. So, better stick to the words, numbers and underscore.

Even if you can use numbers in variable name, you can NOT start with numbers for the variable names.

Also note that, you can not use some special syntax words such as if, for in your variable names as they are reserved for syntaxes.

Note

Remember that a variable can hold various values at different times. So, you can change the value of the variable inside a program/script

Types of variables:

Global variable:

The variables that are outside of the functions, are global variables and it will keep it's value throughout the code, unless you change it.
Local variables:

Those are the variables that you create inside a function and they keep their value only inside this function.
An example:
```
x = 'awesone'

def myfunc():
	x = 'fantastic'
	print('Python is ' + x)

myfunc()

print('Python is ' + x)
```
So in the example above, the value awesome belongs to a global variable whereas the value fantastic belongs to a local variable.

The output will be like below:
```
Python is fantastic
Python is awesome
```

Creating

If you want, you can create a global variable inside a function. To do so, you should use the global keyword.

def myfunc():
	global x
	x = "fantastic"
	
myfunc()

print("Python is " + x)

You can also use the global keyword to change a variable inside a function.

x = 'awesome'

def myfunc():
	global x
	x = 'fantastic'

myfunc()

print("Python is " + x)

Info:

Types of variables:

Global variable:

Local variables:

An example: