3. Text in Python

Introduction to Python

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1. Introduction

2. Numbers in Python

3. Text in Python

4. Making Comparisons

5. Making Choices

6. Exercise: Paper, Scissors, Stone game

7. Lists

8. Loops

9. Simple Web Crawler

3. Text in Python

Data does not have to be numbers. Text is also a useful data type, which is called string Unlike integer and float data types, strings are enclosed in single or double quotation marks (' ' or " ").
"Hello"
You can perform operation on strings:
"Hello" + " mary"
>> Hello mary
​
string1 = "Hello"
string2 = " Eric"
string1 + string2
>> Hello Eric
Note that blank space matters in strings. 
e.g."hello" and " hello"are two different string values. 
You can find out the length of a string (e.g. how many letters) as follow:
len('hello')
>> 5
​
string2 = " Eric"
len('Hello'+string2)
>> 10

Note that len() is a function. A function does some useful work on the an input (content inside the bracket; in this case, the string "hello") and outputs something (e.g. an integer showing the length of the string)

2. Numbers in Python

4. Making Comparisons

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