In programming it is often required to perform a block of commands multiple times. In order to do that, the so-called loops are used. Let's examine an example of a for** loop** that passes sequentially through the numbers from 1 to 10 and prints them:
The loop starts with the for** operator** and passes through all values for a particular variable in a given range, for example the numbers from 1 to 10 (included), and for each value it performs a series of commands.
Watch the video about the for-loop statement: https://youtu.be/yzEamf5L1ZY.
Upon declaring the loop, you can specify a start value and an end value. The body of the loop is usually enclosed in curly brackets { } and represents a block of one or multiple commands. The figure below shows the structure of a for** loop**:
In most cases a for** loop** is run between 1 and n times (for example from 1 to 10). The purpose of the loop is to pass sequentially through the numbers 1, 2, 3, …, n and for each of them to perform a particular action. In the example above, the i variable accepts values from 1 to 10 and the current value is printed in the body of the loop. The loop repeats 10 times and each of these repetitions is called an "iteration".
Now, let's demonstrate how to use the for loop in practice by a few simple examples: