##Demonstrate basic variable assignment
x_int=3
x_int = x_int * x_int
print(x_int)

##Notice that objects have types, but names don't
x=3
print(x," of type ", type(x))
x="three"
print(x," of type ", type(x))

##Getting input from the user
y = input("what is your name? ")
print("hello, ", y)

##Input always returns a string
y = input("enter a number: ")
print(type(y))
print(y)

##Use a constructor to get numbers from the user
y = input("enter a number: ")
y_float = float(y)
print(type(y_float))
print(y_float)
print("the square of your number is ", y_float * y_float)

## class exercise

##Demonstrate formatting of strings
tip = 23.425928
tip_sentence="The tip is ${:.2f}."
print(tip_sentence.format(tip))

##A couple more formatting examples
print("Formatted wider: ${:10.2f}.".format(tip))
print("Wider and left justified: ${:<10.2f}.".format(tip))
tip_percent = 0.16
print("The tip percentage under default formatting is {} and as a percentage is {:.2%}.".format(tip_percent, tip_percent))
##find more rules in the textbook, section 4.4


##string you can use to create a madlib
madlib_str="""Four {} and seven {} ago our {}
brought forth on this {} a new {}, conceived
in {}, and dedicated to the {}
that all {} are created {}."""
print(madlib_str)