![]() #PYTHON CODE CODE#As with loops, any code that should happen if the code is True needs to be indented, to show the computer which code is inside the condition. You then write your condition to be evaluated, within brackets, and then end the line with a colon. Like a loop, you start an if condition with a keyword, in this case the if keyword. You can also add extra statements that could be true into your condition using elif, short for 'else if'. Or you can offer an else as well: code that runs if the statement was False. ![]() On the most basic level, you can just give one option, to run some code if the statement is True, or skip past the code without an alternative if it is False. There are multiple levels you can have to an if condition. ![]() The statement can be evaluated to either True or False, and a True statement will make the code run. By giving the computer a statement to evaluate, you can make it decide whether or not the subsequent code should run, using an if condition. To see more about these loops and have a go, see the Loops section of the Getting started with coding in Python workbook.Īs well as automating repetition, Python can be useful for also automating whether or not certain code should run. Once the indentation ends, that is the end of the loop. Note: In Python, all the code inside the loop (after the colon) must be indented, as this tells the computer which code is in the loop. A while loop is created by starting with while, then defining a condition to be tested each time, and ending the line with a colon. This makes while loops useful if you don't know when the loop will need to stop, but want the code to make that decision based on the condition you give. The while keyword creates a while loop, which means that instead of running through values in turn, the loop returns to evaluate a condition each time the code runs, to check whether it should still be running. Where shopping_list is a list variable you've already created. If you're going to loop through a Python list, you then create a variable that stands for the individual values in that list, then use the keyword in, then finish with the name of the list in question, and a colon. The for keyword in Python is how you start a for loop. This means there are two kinds of loops, for loops and while loops, and we're emphasising those words because they are how you create these loops. So this might be for a particular list of values (like some names) or until a changing numerical variable is above or below a certain value. Loops are used in Python to repeat code multiple times, either for a particular set of values or while a statement remains true.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |