Form 4 - Computer

2024-2025

Floor 4 - Computer Room

Mr. Peter

While Loop Accumulator

Santa Rosa de Lima English Secondary School

聖羅撒英文中學

Colégio de Santa Rosa de Lima - Secção Inglesa

Outline

What is while accumulator in Python

Explore the concept of Accumulator in Looping

How accumulator works in Python

Focusing on the value change of variables in looping

Python accumulator implementation

Define while loop statement for requirements

What is Accumulator?

What is accumulator?

This is a variable

What is accumulator?

This variable called "accumulator"

What is accumulator?

Zero will be stored in most of cases

0

What is accumulator?

0

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

accumulator

What is accumulator?

0 accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

This is a series of numbers

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

0

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

We use loop statement to process each number in the list to the accumulator

0

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

We use loop statement to process each number in the list to the accumulator

0

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

+

In this case, we process the list with using addition operation

0

What is accumulator?

0 accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

+

In this case, we process the list with using addition operation

=

What is accumulator?

0 accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

+

In this case, we process the list with using addition operation

=

1

What is accumulator?

0 accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

+

The result of processed number will be stored to the accumulator

=

1

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

+

The result of processed number will be stored to the accumulator

=

1

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the second number

1

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

1 Let's process the second number

+

=

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

1 Let's process the second number

+

=

3

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the second number

+

=

3

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the second number

3

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

3 +

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

6

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

6

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

6 +

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

10

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

10

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

10 +

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

15

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

15

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Let's process the next number

15 +

What is accumulator?

accumulator

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Series of numbers

Finally, we get the final result in the final loop

21

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

\left[ \begin{array}{c} 1 \\ 2 \\ 3 \\ 4 \\ 5 \\ 6 \end{array} \right]

Start Number

End Number

The increment before numbers

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

accumulator

0

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

accumulator

0 Start Number

Addition operator

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

7 21

Accumulator Implementaion

while i <= 6 :

Tab

i = 1

print(i, s)

s = s + i

Tab

i = i + 1

s = 0

_____

Output

_____

2 1

3 3

4 6

5 10

6 15

7 21

Python Loop Accumulator Statement Exercises

Python Loop Accumulator - Ex01

Write a Python program using a while loop to calculate the sum of all odd numbers from 1 to 99 (i.e., 1, 3, 5, ..., 99).

1. Save your file as "ClassNumber_YourName_Ex01.py"

Use a while loop to iterate through the numbers.

Accumulate the sum of all odd numbers between 1 and 99, inclusive.

Print the final sum.

Accumulator = \sum_{i=1}^{50} (2i - 1)

The final sum number is 2500

Python Loop Accumulator - Ex02