three more on flow of control you have varied the normal forward sequence of operations with functions and for loops to have full power over your programsyou need two more constructions that changing the flow of controldecisions choosing between alternatives (if statements)and more general loops that are not required to be controlled by the elements of collection (while loops if statements simple conditions the statements introduced in this will involve tests or conditions more syntax for conditions will be introduced laterbut for now consider simple arithmetic comparisons that directly translate from math into python try each line separately in the shell type(trueyou see that conditions are either true or false these are the only possible boolean values (named after th century mathematician george boolein python the name boolean is shortened to the type bool it is the type of the results of true-false conditions or tests notethe boolean values true and false have no quotes around themjust as ' is string and without the quotes is not'trueis stringnot of type bool simple if statements run this example programsuitcase py try it at least twicewith inputs and then as you an seeyou get an extra resultdepending on the input the main code isweight float(input("how many pounds does your suitcase weigh")if weight print("there is $ charge for luggage that heavy "print("thank you for your business "the middle two line are an if statement it reads pretty much like english if it is true that the weight is greater than then print the statement about an extra charge if it is not true that the weight is greater than then don' do