Doing a Python Shell Session - Variables, Numbers, Expressions, Strings and Lists. Use of print statement.
Defining variable x and giving the value of 4.
Giving the expression of x**2 and printing it. The ** is exponentiation. For example, 4**2 gives 16.
Conversion of variable x to a string and then getting the length of the string.
Define the variable xstr, which is equal to str(x). The str function converts a number to a string.
Using xstr[0] to get the first character, which gives 4.
Adding 1 to x, which gives 5.
Define a variable y to be a list of 1 element.
Getting the first element of a list, written as y[0].
Defining a list myarr to be 1,2,3,4,5 and 6.
Getting the first element of myarr, which is 1.
Getting the length of the list myarr, which is 6.
