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# -*- coding: utf-8 -*-
"""S01 - Intro + Assignment.ipynb
Automatically generated by Colaboratory.
Original file is located at
https://colab.research.google.com/drive/1wQpAHpzgyKj-LQQhOuJxrHUMH16j4h8F
# Python Programming for Students of Economics
## Summer 2022
After you learn the basics, it's mostly about googling stuff!
## Programming Languages
* Compiled (C, C++, Fortran, Go, ...)
* Interpreted (Python, R, ...)
* Compiled into intermediate languages (Java, C#, ...)
* JIT Compiled (Julia, ...)
Distributions:
* Compiler / Interpreter
* IDE
* Selected libraries
* Other tools
Languages we will use:
* Python (mostly)
* R
* Julia
Methods to write and run code!
* write code in an editor and save, run in console
* do the above in an IDE (eg. spyder / RStudio)
* get into REPL, write and run there
* use the notebook method (Jupyter)
## Anaconda Python Distribution
Anaconda: https://www.anaconda.com/
Download https://www.anaconda.com/products/individual-d and Install
## Julia
Julia Language: https://julialang.org/
Download https://julialang.org/downloads/ and install
Enable using Julia in Jupyter:
```{Julia}
using Pkg
Pkg.add("IJulia")
```
## R
R Project: https://www.r-project.org/
Download https://cloud.r-project.org/bin/windows/base/ and Install
Enable using R in Jupyter:
```{r}
install.packages("IRkernel")
IRkernel::installspec()
```
# Some comparisons:
[VOX EU: Which programming language is best for economic research: Julia, Matlab, Python or R?](https://voxeu.org/article/which-programming-language-best-economic-research)
[Aruoba, S. B., & Fernández-Villaverde, J. (2015). A comparison of programming languages in macroeconomics. Journal of Economic Dynamics and Control, 58, 265-273.](https://sci-hub.se/10.1016/j.jedc.2015.05.009)
[Open Risk Manual: Overview of the Julia-Python-R Universe](https://www.openriskmanual.org/wiki/Overview_of_the_Julia-Python-R_Universe)
[Julia Language: Noteworthy Differences from other Languages](https://docs.julialang.org/en/v1/manual/noteworthy-differences/)
[QuantEcon Cheatsheets: MATLAB–Python–Julia cheatsheet](https://cheatsheets.quantecon.org/)
Notes on programming (will have more later):
The two main principles for coding and managing data are:
1. Make things easier for your future self
2. Don’t trust your future self
## References
[Numerical Python](https://www.apress.com/gp/book/9781484242452)
[W3Schools Python](https://www.w3schools.com/python/default.asp)
good sources:
* [Jesús Fernández-Villaverde Teachings](https://www.sas.upenn.edu/~jesusfv/teaching.html)
* [QuantEcon](https://quantecon.org/)
## Program as a series of _statements_
"""
print("Hellow world!")
print("This is a python code!")
print("The code for this program might be different in a lot of other languages!")
"""## Assignments
Think of variable as a kitchen bowl that keeps something in it. name of the variable is the label on the bowl!
Assignment is to pour stuff in a bowl (maybe from other bowls)!
"""
a = 1
b = 2
print(a)
a = a + 1
print(a)
# we use # sign for comments
# it means the rest of the line will not run
# b = 3
print(b) # you can use it after a sentence too!
"""**naming rules** (specific to python, each language has it's own rules):
* A variable name must start with a letter or the underscore character
* A variable name cannot start with a number
* A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
* Variable names are case-sensitive (`age`, `Age` and `AGE` are three different variables)
"""
#Legal variable names:
myvar = "John"
my_var = "John"
_my_var = "John"
myVar = "John"
MYVAR = "John"
myvar2 = "John"
#Illegal variable names:
2myvar = "John"
my-var = "John"
my var = "John"
# Naming Conventions
variable_name = 3
VaribaleName = 5
variableName = 4
Student_ID = 4
StudentID = 86205022
print(Student_ID)