When do I use for loops? It is to be noted that the statements that are executed after the while loop can be a single line or even a block of code containing multiple lines. Using proper indentations is the only way how you can let Python know that in which for loop (the inner or the outer) you would like to apply your block of code.
The following is the general syntax for the python for loop: for {variable} in {some-sequence-type}: {python-statements} else: {python-statements} In python, the for loop can iterate through several sequence types such as lists, strings, tuples, etc. In this tutorial, learn how to use while loop in Python.

for loops are traditionally used when you have a block of code which you want to repeat a fixed number of times. This is not the case for python where you can comment several lines the same way you are commenting a single line: # This # is # a # multi-line # comment Python multiline comments "pro way" The following is the general syntax for the python for loop: for {variable} in {some-sequence-type}: {python-statements} else: {python-statements} In python, the for loop can iterate through several sequence types such as lists, strings, tuples, etc. Some languages like Java has native support for multiline comments. zip() function stops when anyone of the list of all the lists gets exhausted. The statement can be a single line of code or multiple lines of code. Python multiline comments. In python there is only one symbol for comments which is #. These operators combine several true/false values into a final True or False outcome (Sweigart, 2015). A good example of this can be seen in the for loop.While similar loops exist in virtually all programming languages, the Python for loop is easier to come to grips with since it reads almost like English.. You will also learn to use the control statements with the Python while loop. In the statement, you can also put the if condition statement. Example 1. Looping Through Multiple Lists Credit: Andy McKay Problem You need to loop through every item of multiple lists.
Simplify your Python loops. Plot multiple lines on one chart with different style Python matplotlib rischan Data Analysis , Matplotlib , Plotting in Python November 24, 2017 January 22, 2020 2 Minutes Sometimes we need to plot multiple lines on one chart using different styles such as dot, line, dash, or maybe with different colour as well. Furthermore the variable in the heading ( count here) may be used in the block, and each time through it takes on the next value in the sequence, so the first time through the loop count is 1, then 2, and finally 3. Say you have: a = ['a1', … - Selection from Python Cookbook [Book]

Solution There are basically three approaches. Python’s easy readability makes it one of the best programming languages to learn for beginners. That outcome says how our conditions combine, and that determines whether our if statement runs or not. The syntax for a nested while loop statement in Python programming language is as follows − while expression: while expression: statement(s) statement(s) A final note on loop nesting is that you can put any type of loop inside of any other type of loop. 2. while condition: statement. The block of lines is repeated once for each element of the sequence, so in this example the two lines in the indented block are repeated three times. If you’re like most programmers, you know that, eventually, once you have an array, you’re gonna have to write a loop. Python For Loops and If Statements Combined (Python for Data Science Basics #6) Written by Tomi Mester on April 11, 2018. In this tutorial, we’ll describe multiple ways in Python to read a file line by line with examples such as using readlines(), context manager, while loops, etc. We can iterate over lists simultaneously in ways: zip() : In Python 3, zip returns an iterator. Most of the time, this is fine and dandy, but sometimes you just don’t want to take up the multiple lines required to write out the full for loop for some simple thing. To test multiple conditions in an if or elif clause we use so-called logical operators. For better understanding of iteration of multiple lists, we are iterating over 3 lists at a time. After this, you can adopt one of these methods in your projects that fits the best as per conditions. For example a for loop can be inside a while loop or vice versa. As we can see above, the while loop will continue to run until the Boolean expression is TRUE. fileinput — Iterate over lines from multiple input streams¶ Source code: Lib/fileinput.py This module implements a helper class and functions to quickly write a loop over standard input or a list of files. Usage in Python. Python multiline string using join() We can also split a string into multiple lines using string join() function . Note that in brackets or backslash way, we have to take care of spaces yourself and if the string is really long then it can be a nightmare to check for spaces or double spaces. The Python for statement iterates over the members of a sequence in order, executing the block each time. For loops. #Test multiple conditions with a single Python if statement.