While, For and Nested Loop
Learning how to effectively use loop statements in Python can truly transform the way you code. With properly structured while, for, and nested loops, you’ll be able to stand out as a skilled coder by writing shorter, more efficient programs with fewer bugs. But when it comes to actually using these powerful statements, where do you start? If this is something that’s been puzzling you lately, then you do not need to worry about that because this article will help enlighten and educate you on the basics of loop statement usage in the Python language!
What is a loop in Python
Loop statements in python programming language are one of the most powerful tools of the language. They allow the developer as well as the user to repeat a set of commands for a specific number of times, or until some condition is true. Loop statements also make it easy to loop through items contained in lists, tuples and dictionaries. Loop statements add great structure and flexibility to any python code and it allows the coder to accomplish more with fewer lines, and making simple operations much easier than writing out individual lines for each loop to run
Different types of loops in python
There are three types of loops in python, those are:
- Python while loop
- Python for loop
- Python nested loop
Python while loop
A python while loop is a control flow statement used to perform repetitive actions while a given condition remains true. A while loop continues the execution until the condition becomes false or is broken by an internal command. It allows developers to create code that can be repeated indefinitely and provides specific conditions in which the iterative action should take place. Using python while loops are a great way to ensure that any code is bug-free and reliable since only the correct input conditions will keep that particular loop running.
while expression: statement(s)
count = 0 while (count < 10): print 'The count is:', count count = count + 1 print "Good bye!"
The count is: 0 The count is: 1 The count is: 2 The count is: 3 The count is: 4 The count is: 5 The count is: 6 The count is: 7 The count is: 8 The count is: 9 Good bye!
Python for loop
Python for loops is a fantastic way to automate repeated tasks and save time. Writing out a for loop program in python language can help the developer cycle through an entire databank or operation within a few minutes and it helps to process each item individually by using the same method. This allows for a much more efficient approach compared to systematically running line-by-line code whether it be to produce data or complete computational operations. The python for loop is exceptionally useful and powerful, improving the efficiency of countless workflow processes.
for iterating_var in sequence: statements(s)
for letter in 'Python': # First Example print 'Current Letter :', letter fruits = ['guava', 'apple', 'mango'] for fruit in fruits: # Second Example print 'Current fruit :', fruit print "Good bye!"
Current Letter : P Current Letter : y Current Letter : t Current Letter : h Current Letter : o Current Letter : n Current fruit : guava Current fruit : apple Current fruit : mango Good bye!
Python Nested loop
Working with nested loops in Python can quickly become complicated. When it comes to nested loops it needs to understand the correct syntax and how to properly structure the nested loop statement are essential elements of writing effective code. With nested loops, anyone can access records through a series of iterations until the desired output is achieved. Each nested loop creates an additional layer around the contents of the preceding loop, making it easier for users to sort out complex data sets. A nested loop of python programming language structure helps the developer, as well as the user, write efficient and secure code without having to manually type out multiple commands.
Syntax for Nested for loop
for iterating_var in sequence: for iterating_var in sequence: statements(s) statements(s)
Syntax for Nested while loop
while expression: while expression: statement(s) statement(s)
i = 2 while(i < 100): j = 2 while(j <= (i/j)): if not(i%j): break j = j + 1 if (j > i/j) : print i, " is prime" i = i + 1 print "Good bye!"
2 is prime 3 is prime 5 is prime 7 is prime 11 is prime 13 is prime 17 is prime 19 is prime 23 is prime 29 is prime 31 is prime 37 is prime 41 is prime 43 is prime 47 is prime 53 is prime 59 is prime 61 is prime 67 is prime 71 is prime 73 is prime 79 is prime 83 is prime 89 is prime 97 is prime Good bye!
In this article, we have learned about the different types of loop statements in Python. We have also seen how to use them with the help of examples. I hope you found this article helpful.
Take our free skill tests to evaluate your skill!
In less than 5 minutes, with our skill test, you can identify your knowledge gaps and strengths.