Menu Close

How do I iterate over a date in python?

How do I iterate over a date in python?

How to iterate through a range of dates in Python

  1. start_date = datetime. date(2020, 1, 1)
  2. end_date = datetime. date(2020, 1, 4)
  3. delta = datetime. timedelta(days=1)
  4. while start_date <= end_date:
  5. print(start_date)
  6. start_date += delta.

How do you increment a variable in a for loop in Python?

Python For Loop With Incremental Numbers Apart from specifying a start-value and end-value, we can also specify an increment-value. For example, if you want a sequence like this: 1, 3, 5, 7, 9, …, then the increment-value in this case would be 2, as we are incrementing the next number by 2.

How do you assign a date to a variable in Python?

Python Datetime

  1. ❮ Previous Next ❯
  2. Import the datetime module and display the current date: import datetime. x =
  3. Return the year and name of weekday: import datetime. x =
  4. Create a date object: import datetime.
  5. Display the name of the month: import datetime.
  6. ❮ Previous Next ❯

What is a loop variable in Python?

It is usually characterized by the use of an implicit or explicit iterator. In each iteration step a loop variable is set to a value in a sequence or other data collection. This kind of for loop is known in most Unix and Linux shells and it is the one which is implemented in Python.

What is a loop variable?

In computer programming, a loop variable is a variable that is set in order to execute some iterations of a “for” loop or other live structure. A loop variable is a classical fixture in programming that helps computers to handle repeated instructions.

How do you write a for loop?


  1. The init step is executed first, and only once. This step allows you to declare and initialize any loop control variables.
  2. Next, the condition is evaluated.
  3. After the body of the ‘for’ loop executes, the flow of control jumps back up to the increment statement.
  4. The condition is now evaluated again.

What are the two ways to end a loop?

The only way to exit a loop, in the usual circumstances is for the loop condition to evaluate to false. There are however, two control flow statements that allow you to change the control flow. continue causes the control flow to jump to the loop condition (for while, do while loops) or to the update (for for loops).

How do you count while loops?

The first line of the while loop creates the variable counter and sets its value to 1. The second line tests if the value of counter is less than 11 and if so it executes the body of the loop. The body of the loop prints the current value of counter and then increments the value of counter .

How many times does a while loop execute?

while loop always run one time even if the condition is false. It runs the loop before checking the condition and so on.

What is a loop counter Python?

In Python, a for loop is usually written as a loop over an iterable object. This means you don’t need a counting variable to access items in the iterable. Rather than creating and incrementing a variable yourself, you can use Python’s enumerate() to get a counter and the value from the iterable at the same time!

What is while and do while loop?

while loop is similar to a while loop, except that a do… while loop is guaranteed to execute at least one time. do { statement(s); } while( condition ); Notice that the conditional expression appears at the end of the loop, so the statement(s) in the loop execute once before the condition is tested.

How does while loop work?

Overview. The while construct consists of a block of code and a condition/expression. This repeats until the condition/expression becomes false. Because the while loop checks the condition/expression before the block is executed, the control structure is often also known as a pre-test loop.

WHY IS FOR loop better than while?

In general, you should use a for loop when you know how many times the loop should run. If you want the loop to break based on a condition other than the number of times it runs, you should use a while loop.

Is for better than while?

The main difference between the for ‘s and the while ‘s is a matter of pragmatics: we usually use for when there is a known number of iterations, and use while constructs when the number of iterations in not known in advance.

Which is better in for and while?

Use a for loop when you know the loop should execute n times. Use a while loop for reading a file into a variable. Use a while loop when asking for user input. Use a while loop when the increment value is nonstandard.

What is faster than for loop?

Conclusions. List comprehensions are often not only more readable but also faster than using “for loops.” They can simplify your code, but if you put too much logic inside, they will instead become harder to read and understand.

What is the difference between for and while?

The ‘for’ loop used only when we already knew the number of iterations. The ‘while’ loop used only when the number of iteration are not exactly known. If the condition is not put up in ‘for’ loop, then loop iterates infinite times. If the condition is not put up in ‘while’ loop, it provides compilation error.