Python Programming

Remember that the division operator results in a float.

Remember that a floor division operation results in an int.

Remember that a modulo operation results in an int.

The resulting type of an exponentiation depends on the operand. If either of the operand is a float, then the resulting type is also a float.

Remember operator precedence! Multiplication goes first!

Both operands are strings, whatever the type of quotes used.

String multiplication. Note that there should be a space at the end of the string to be exactly correct, i.e. 'Welcome to London Welcome to London Welcome to London Welcome to London '.

You cannot concatenate a str to an int. The correct way to do this is either to explicitly convert the int to a str (a = "My age is " + str(20)), or even better use Python f-strings (a = f"My age is {20}").

The literal True is case sensitive. Otherwise, true is just a variable. Python returns a NameError: name 'true' is not defined because you have not defined the variable true!

The variable b points to the int object with value 3, no matter what a points to after that.

How can you add x + 8 when you do not even know what x is? What do you think Python's error message will look like? (Test it out yourself!)

The identifier if is a Python reserved word, so you cannot use it as a variable name. It does not make semantic sense anyway - would you typically name someone as if?

It is fine if you simply entered int, I am providing you the exact answer returned by Python.

The data type float is not a reserved word, so you can technically use it as a variable name. Please do not do this though -- it is confusing and hard to read!