Expressions, Statements, and Functions

1 + 2 * 5
[1, 2, 3]
'A string'
"first string" + " second string"

print "Hello World!"
x = 2 + 2
if x>3:
   print "x is greater than 3"
else:
   print "x is not greater than 3"

def square(x):
    return x*x