I am confused with what is Dot Notation and What is the use of len() and str()

# What is dot notation?

**stetim94**#2

well, to understand the dot notation, you will need to understand classes

for now, just write down which functions use dot notation

`len()`

will give you the length of a list or string. Lets say i have a list with your hobbies, i can count the length to know how many hobbies you have

`str()`

can convert to string, lets say, i want to print a number + string i get:

`print "the number of pi is: " + str(3.14)`

yes, i know we can just `"3.14"`

, but this is not always possible, i would have to make the example more complicated

**system**#4

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