The for statement differs from what programmers of C or C++ are used to. The for statement of Python looks a bit like the for loop of the Bash shell.
We often need to go through all the elements of a list or perform an operation over a series of numbers. The Python for statement is the right tool to go easily through various types of lists and ranges. Continue reading For Loops
Many algorithms make it necessary for a programming language to have a construct which makes it possible to carry out a sequence of statements repeatedly. The code within the loop, i.e. the code carried out repeatedly is called the body of the loop.
Python supplies two different kinds of loops: the while loop and the for loop.
Most loops contain a counter or more generally variables, which change their values in the course of calculation. These variables have to be initialized before the loop is is started. The counter or other variables, which can be altered in the body of the loop, are contained in the condition. Before the body of the loop is executed, the condition is evaluated. If it evaluates to True, the body gets executed. After the body is finished, the condition will be evaluated again. The body of the loop will be executed as long as the condition yields True. Continue reading Loops