Learn python 6 loops how to repeat code execution

Publié le: 29 août 2024
sur la chaîne: CodeTime

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certainly! loops are a fundamental concept in programming that allow you to execute a block of code multiple times without having to write it out repeatedly. in python, there are several types of loops, but the two most common are the `for` loop and the `while` loop.

1. for loop

the `for` loop is used to iterate over a sequence (like a list, tuple, dictionary, set, or string). it allows you to execute a block of code for each item in the sequence.

#### syntax:

#### example:

*output:*

in this example, `range(5)` generates a sequence of numbers from 0 to 4. the `for` loop iterates over each number and prints it.

2. while loop

the `while` loop repeatedly executes a block of code as long as a specified condition is true.

#### syntax:

#### example:

*output:*

in this example, the `while` loop continues to execute as long as `i` is less than 5. it prints the value of `i` and increments it by 1 in each iteration.

3. loop control statements

python provides control statements that can alter the flow of loops:

**break**: exit the loop prematurely.
**continue**: skip the current iteration and move to the next.
**pass**: do nothing; it's a placeholder.

#### example of break:

*output:*

#### example of continue:

*output:*

4. nested loops

you can also nest loops, which means you can have a loop inside another loop. this is useful for working with multidimensional data structures.

#### example:

*output:*

5. looping through collections

both `for` and `while` loops can be used to iterate through different types of collections, such as lists, tuples, and dictionaries.

#### example with a list:

*output:*

#### example with a dictionary:

*output:*

summary

loops are a powerful feature in python that allow you to automate repetitive tasks. the `for` loop is useful for iterating over sequences, while the `while` loop is great for executing code until a condition changes. by mastering loops, you can write more ...

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