Python For Loops. A for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string). This is less like the for keyword in other programming languages, and works more like an iterator method as found in …

Python supports the usual logical conditions from mathematics: Equals: a == b; Not Equals: a != b; Less than: a < b; Less than or equal to: a <= b; Greater than: a > b; Greater than or equal to: a >= b; These conditions can be used in several ways, most commonly in "if statements" and loops. An "if statement" is written by using the if keyword.

The range() Function To loop through a set of code a specified number of times, we can use the range(). function,. The range() function returns a sequence of numbers, starting from 0 by default, and increments by 1 (by default), and ends at a specified number.

Execute Python Syntax. As we learned in the previous page, Python syntax can be executed by writing directly in the Command Line:

Python Examples. Learn by examples! This tutorial supplements all explanations with clarifying examples. See All Python Examples

When you know exactly how many times you want to loop through a block of code, use the for loop instead of a while loop: Syntax for ( statement 1 ; statement 2 ; statement 3 ) { // code block to be executed }

Python supports the usual logical conditions from mathematics: Equals: a == b; Not Equals: a != b; Less than: a < b; Less than or equal to: a <= b; Greater than: a > b; Greater than or equal to: a >= b; These conditions can be used in several ways, most commonly in "if statements" and loops. An "if statement" is written by using the if keyword.

When you know exactly how many times you want to loop through a block of code, use the for loop instead of a while loop: Syntax for ( expression 1 ; expression 2 ; expression 3 ) {

Note: Python does not have built-in support for Arrays, but Python Lists can be used instead. Arrays Note: This page shows you how to use LISTS as ARRAYS, however, to work with arrays in Python you will have to import a library, like the NumPy library .

Loop Through a Dictionary. You can loop through a dictionary by using a for loop. When looping through a dictionary, the return value are the keys of the dictionary, but there are methods to return the values as well.