how to run python online code example

Example 1: python ide online

#1
https://www.onlinegdb.com/online_python_compiler
#2
https://repl.it/languages/python3

Example 2: run python online

# Here's the best online Python IDE: https://repl.it
# It allows for many languages and not just python!

Example 3: online python compiler

Use repl.it! 
https://repl.it/languages/python3

Example 4: python code runner online

print "Did you know that " + str(n) + " squared is " + str(n*n) + "?"