#!/usr/bin/env python
# coding: utf-8

# # Practice Problems
# ### Lecture 2
# 
# 
# Answer each number in a separate cell
# 
# Rename this notebook with your last name, first initial and the (2 digit) lecture number. 
#     
#     ex. Cych_B_02
#     
# Turn in this notebook on Canvas. 

# 1. Conceptual
#     - Insert a markdown cell into your practice notebook and answer the questions:
#         - Why are descriptive variable names useful?
#         - What are _reserved words_ and why can't you use them as variable names?
# 
# 2. Variables
#     - Insert a code cell into your practice notebook
#     - In it, define a variable that  stores the value of pi (3.1415)
# 	- Define a variable called **radius**, that stores any floating point number (radius)
# 	- Define a string that stores "is the circumference of a circle with radius" 
# 
# 3. Operations
#     - Insert another code cell into your practice notebook.  
# 	- Calculate the circumference of a circle using the variables you defined earlier and store the answer in a separate variable.
#     - print your new variable.
# 
# 4. Changing variable types
#     - Convert all your variables (**circumference** and **radius**) into  strings
#     - Use the + operator to add  them together to make this string:
# 		**circumference** is the circumference of a circle with radius of **radius** 
#     - **boldface** words are your new strings].  
# 
# 5. Strings and string operation
# 	- Define a variable with the value:
# 			"Scripps Institution of Oceanography"
# 	- Print out the first 7 characters 
#     - print indices 8 to 19
# 	- Print index 23 to the end
#         
# 6. Putting it all together
# 
#     - Create an integer variable **depth** and set it to  6
#     - Create a string variable **planet** and set it to “Earth”
#     - convert the variable **depth** into a string 
#     - Create a variable **ocean_depth** and set it to the string:  “The average ocean depth on Earth is 6 km” by using the variables depth and planet instead of Earth and 6
#     - print out the variable **ocean_depth**

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