Using for loops to iterate data structures

Computing

Creating lists in Python

Python list operations

Iterating through data structures

Mathematical operations in data structures

Data structure projects in Python

In this unit pupils will discover how data is represented and processed in sequences, such as lists and strings. They will cover a spectrum of operations on sequences of data, that range from accessing an individual element to manipulating the entire sequence though real world practical activites.

Python programming with sequences of data

Which type of loop is used in Python for count-controlled iteration?

What will the following code display?

```for count in range (1,8):
     print(count)```

A {{}} loop is used for condition-controlled iteration. 

What would be the output of this code when it is run?
```rolls = [1, 4, 3, 6]
count = 0
for dice in rolls:
    count = count + 1
print(count)```

What would be the output of this code when it is run?
```rolls = [1, 4, 3, 6]
count = 0
for dice in rolls:
    if dice >= 3:
         count = count + 1
print(count)```

The process of repeating a sequence of instructions within a program loop is the definition of which term?

What is the term for a variable that is used to signal a change in a program's state?

A while loop will continue to iterate until ...

The code will print 1, 2, 3 ... and so on until the program is stopped manually.

What would be displayed if this code was run?
```count = 1
while True:
    print(count)
    count = count + 1```

What item is held in rolls[3] of this list?
```rolls = [1, 4, 3, 6]```

Using for loops to iterate data structures

Lesson outcome