What is FOR destination?

FOR destination is a command in the FOR loop syntax. It specifies where the loop variable takes its values from.

In the FOR loop, a loop variable is used to iterate over a set of elements or values. The FOR destination specifies the source of these values.

The syntax of FOR loop with FOR destination is:

```

for identifier in destination

do

# commands

done

```

Here,

* destination is the FOR destination, which can be a list, tuple, string, set, dictionary, file object, range object, etc.

* identifier is the loop variable that takes values from the destination.

* The do keyword introduces the loop body.

* The commands inside the loop body are executed repeatedly for each value in the destination.

* The done keyword marks the end of the loop.

Here are some examples of FOR loop with different FOR destinations:

```python

Iterate over the elements in a list

numbers = [1, 2, 3, 4]

for number in numbers:

print(number)

Iterate over a range of numbers

for number in range(5):

print(number)

Iterate over the characters in a string

word = "Hello"

for letter in word:

print(letter)

Iterate over the lines in a file

with open("myfile.txt", "r") as file:

for line in file:

print(line)

```

In these examples, the FOR destination can be a list, range object, string, or file object. The loop variable takes its values from the specified destination, and the commands inside the loop body are executed repeatedly for each value.