Welcome to Python loops! Loops are essential control structures that let you execute code repeatedly. Python provides two main types: for loops and while loops. For loops iterate over sequences like lists or ranges, while while loops continue as long as a condition remains true. Let's explore how they work with a simple flowchart and code examples.
For loops are perfect for iterating over sequences. You can loop through lists, strings, ranges, and tuples. The loop variable automatically takes each value from the sequence one by one. This makes for loops ideal when you know exactly what you want to iterate over.
While loops are perfect when you don't know exactly how many times you need to repeat something. They continue as long as a condition is true. Remember to always include an update statement that eventually makes the condition false, otherwise you'll create an infinite loop!
Sometimes you need to control loop execution more precisely. The break statement lets you exit a loop immediately when a certain condition is met. The continue statement skips the rest of the current iteration and moves to the next one. These tools give you fine-grained control over your loops.
Loops are fundamental to programming and you'll use them constantly. For loops are perfect when you know what you're iterating over, like processing a list of data. While loops excel when you need to repeat until a condition changes, like validating user input. With practice, you'll intuitively know which loop to use for any situation.
For loops are perfect for iterating over sequences. You can loop through lists, strings, ranges, and tuples. The loop variable automatically takes each value from the sequence one by one. This makes for loops ideal when you know exactly what you want to iterate over.
While loops are perfect when you don't know exactly how many times you need to repeat something. They continue as long as a condition is true. Remember to always include an update statement that eventually makes the condition false, otherwise you'll create an infinite loop!
Sometimes you need to control loop execution more precisely. The break statement lets you exit a loop immediately when a certain condition is met. The continue statement skips the rest of the current iteration and moves to the next one. These tools give you fine-grained control over your loops.