How Do I Use Loops In Python?

In Python, you can use loops to repeat a block of code a certain number of times, or until a certain condition is met. There are two types of loops in Python: for loops and while loops.

Using for loops

For loops are used to iterate over a sequence (such as a list, tuple, or string), and perform some action on each element in the sequence. The basic syntax for a for loop is:

Here, item is a variable that takes on the value of each element in the sequence on each iteration of the loop. The code inside the loop is indented and executed once for each element in the sequence.

For example, to print each element in a list of numbers, you can use a for loop like this:

Using while loops

While loops are used to repeatedly execute a block of code as long as a certain condition is true. The basic syntax for a while loop is:

Here, condition is an expression that is evaluated before each iteration of the loop. If the condition is true, the code inside the loop is executed. This continues until the condition is false.

For example, to print the numbers 1 to 5 using a while loop, you can do:

In this example, i starts at 1, and the loop continues as long as i is less than or equal to 5. The code inside the loop prints the value of i, and then increments i by 1.

You can also use the break and continue statements to control the flow of a loop. break is used to exit the loop early, while continue is used to skip the rest of the code in the loop and move on to the next iteration.

In this example, the break statement is used to exit the loop early when n is equal to 5, while the continue statement is used to skip printing even numbers.