A pile of 30 cards
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SECTION 07 / 13
Flowcharts: draw decisions and repetition
On this page 4 headings
A flowchart draws a procedure using shapes and arrows. It shows the order of operations, the choices that can be made, and the steps that repeat.
YOUR COURSE DATA · TRY IT HERE
Count the score cards
Use the supplied 30 score cards. No download or coding is needed.
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Look through all 30 original records
BhuvaneshMaths 68 · Erode
- CardNo
- 0
- Name
- Bhuvanesh
- Gender
- M
- DateOfBirth
- 7 Nov
- CityTown
- Erode
- Mathematics
- 68
- Physics
- 64
- Chemistry
- 78
- Total
- 210
HarishMaths 62 · Salem
- CardNo
- 1
- Name
- Harish
- Gender
- M
- DateOfBirth
- 3 Jun
- CityTown
- Salem
- Mathematics
- 62
- Physics
- 45
- Chemistry
- 91
- Total
- 198
ShashankMaths 57 · Chennai
- CardNo
- 2
- Name
- Shashank
- Gender
- M
- DateOfBirth
- 4 Jan
- CityTown
- Chennai
- Mathematics
- 57
- Physics
- 54
- Chemistry
- 77
- Total
- 188
RidaMaths 42 · Chennai
- CardNo
- 3
- Name
- Rida
- Gender
- F
- DateOfBirth
- 5 May
- CityTown
- Chennai
- Mathematics
- 42
- Physics
- 53
- Chemistry
- 78
- Total
- 173
RitikaMaths 87 · Madurai
- CardNo
- 4
- Name
- Ritika
- Gender
- F
- DateOfBirth
- 17 Nov
- CityTown
- Madurai
- Mathematics
- 87
- Physics
- 64
- Chemistry
- 89
- Total
- 240
AkshayaMaths 71 · Chennai
- CardNo
- 5
- Name
- Akshaya
- Gender
- F
- DateOfBirth
- 8 Feb
- CityTown
- Chennai
- Mathematics
- 71
- Physics
- 92
- Chemistry
- 84
- Total
- 247
SameerMaths 81 · Ambur
- CardNo
- 6
- Name
- Sameer
- Gender
- M
- DateOfBirth
- 23 Mar
- CityTown
- Ambur
- Mathematics
- 81
- Physics
- 82
- Chemistry
- 87
- Total
- 250
AdityaMaths 84 · Vellore
- CardNo
- 7
- Name
- Aditya
- Gender
- M
- DateOfBirth
- 15 Mar
- CityTown
- Vellore
- Mathematics
- 84
- Physics
- 92
- Chemistry
- 76
- Total
- 252
SuryaMaths 74 · Bengaluru
- CardNo
- 8
- Name
- Surya
- Gender
- M
- DateOfBirth
- 28 Feb
- CityTown
- Bengaluru
- Mathematics
- 74
- Physics
- 64
- Chemistry
- 51
- Total
- 189
ClarenceMaths 63 · Bengaluru
- CardNo
- 9
- Name
- Clarence
- Gender
- M
- DateOfBirth
- 6 Dec
- CityTown
- Bengaluru
- Mathematics
- 63
- Physics
- 88
- Chemistry
- 73
- Total
- 224
KavyaMaths 64 · Chennai
- CardNo
- 10
- Name
- Kavya
- Gender
- F
- DateOfBirth
- 12 Jan
- CityTown
- Chennai
- Mathematics
- 64
- Physics
- 72
- Chemistry
- 68
- Total
- 204
RahulMaths 97 · Bengaluru
- CardNo
- 11
- Name
- Rahul
- Gender
- M
- DateOfBirth
- 30 Apr
- CityTown
- Bengaluru
- Mathematics
- 97
- Physics
- 92
- Chemistry
- 92
- Total
- 281
SrinidhiMaths 52 · Chennai
- CardNo
- 12
- Name
- Srinidhi
- Gender
- F
- DateOfBirth
- 14 Jan
- CityTown
- Chennai
- Mathematics
- 52
- Physics
- 64
- Chemistry
- 71
- Total
- 187
GopiMaths 65 · Madurai
- CardNo
- 13
- Name
- Gopi
- Gender
- M
- DateOfBirth
- 6 May
- CityTown
- Madurai
- Mathematics
- 65
- Physics
- 73
- Chemistry
- 89
- Total
- 227
SophiaMaths 89 · Trichy
- CardNo
- 14
- Name
- Sophia
- Gender
- F
- DateOfBirth
- 23 July
- CityTown
- Trichy
- Mathematics
- 89
- Physics
- 62
- Chemistry
- 93
- Total
- 244
GoutamiMaths 76 · Theni
- CardNo
- 15
- Name
- Goutami
- Gender
- F
- DateOfBirth
- 22 Sep
- CityTown
- Theni
- Mathematics
- 76
- Physics
- 58
- Chemistry
- 90
- Total
- 224
TauseefMaths 87 · Trichy
- CardNo
- 16
- Name
- Tauseef
- Gender
- M
- DateOfBirth
- 30 Dec
- CityTown
- Trichy
- Mathematics
- 87
- Physics
- 86
- Chemistry
- 43
- Total
- 216
ArshadMaths 62 · Chennai
- CardNo
- 17
- Name
- Arshad
- Gender
- M
- DateOfBirth
- 14 Dec
- CityTown
- Chennai
- Mathematics
- 62
- Physics
- 81
- Chemistry
- 67
- Total
- 210
AbiramiMaths 72 · Erode
- CardNo
- 18
- Name
- Abirami
- Gender
- F
- DateOfBirth
- 9 Oct
- CityTown
- Erode
- Mathematics
- 72
- Physics
- 92
- Chemistry
- 97
- Total
- 261
VetrivelMaths 56 · Trichy
- CardNo
- 19
- Name
- Vetrivel
- Gender
- M
- DateOfBirth
- 30 Aug
- CityTown
- Trichy
- Mathematics
- 56
- Physics
- 78
- Chemistry
- 62
- Total
- 196
KalyanMaths 93 · Vellore
- CardNo
- 20
- Name
- Kalyan
- Gender
- M
- DateOfBirth
- 17 Sep
- CityTown
- Vellore
- Mathematics
- 93
- Physics
- 68
- Chemistry
- 91
- Total
- 252
MonikaMaths 78 · Bengaluru
- CardNo
- 21
- Name
- Monika
- Gender
- F
- DateOfBirth
- 15 Mar
- CityTown
- Bengaluru
- Mathematics
- 78
- Physics
- 69
- Chemistry
- 74
- Total
- 221
PriyaMaths 62 · Nagercoil
- CardNo
- 22
- Name
- Priya
- Gender
- F
- DateOfBirth
- 17 Jul
- CityTown
- Nagercoil
- Mathematics
- 62
- Physics
- 62
- Chemistry
- 57
- Total
- 181
DeepikaMaths 97 · Bengaluru
- CardNo
- 23
- Name
- Deepika
- Gender
- F
- DateOfBirth
- 13 May
- CityTown
- Bengaluru
- Mathematics
- 97
- Physics
- 91
- Chemistry
- 88
- Total
- 276
SiddharthMaths 44 · Madurai
- CardNo
- 24
- Name
- Siddharth
- Gender
- M
- DateOfBirth
- 26 Dec
- CityTown
- Madurai
- Mathematics
- 44
- Physics
- 72
- Chemistry
- 58
- Total
- 174
GeetaMaths 87 · Chennai
- CardNo
- 25
- Name
- Geeta
- Gender
- F
- DateOfBirth
- 16 May
- CityTown
- Chennai
- Mathematics
- 87
- Physics
- 75
- Chemistry
- 92
- Total
- 254
JKMaths 74 · Chennai
- CardNo
- 26
- Name
- JK
- Gender
- M
- DateOfBirth
- 22 Jul
- CityTown
- Chennai
- Mathematics
- 74
- Physics
- 71
- Chemistry
- 82
- Total
- 227
JaganMaths 81 · Madurai
- CardNo
- 27
- Name
- Jagan
- Gender
- M
- DateOfBirth
- 4 Mar
- CityTown
- Madurai
- Mathematics
- 81
- Physics
- 76
- Chemistry
- 52
- Total
- 209
NishaMaths 74 · Madurai
- CardNo
- 28
- Name
- Nisha
- Gender
- F
- DateOfBirth
- 10 Sep
- CityTown
- Madurai
- Mathematics
- 74
- Physics
- 83
- Chemistry
- 83
- Total
- 240
NaveenMaths 72 · Vellore
- CardNo
- 29
- Name
- Naveen
- Gender
- M
- DateOfBirth
- 13 Oct
- CityTown
- Vellore
- Mathematics
- 72
- Physics
- 66
- Chemistry
- 81
- Total
- 219
Learn the four main symbols
| Symbol | Meaning | Example |
|---|---|---|
| Terminal (oval or rounded end shape) | Start or end of the procedure | Start; End |
| Process (rectangle) | An action or variable update | Count ← Count + 1 |
| Decision (diamond) | A condition with True/False paths | More cards in Pile 1? |
| Flowline (arrow) | Direction and order of execution | Return to the loop test |
Follow the counting flowchart
Start, set Count to zero, then test whether Pile 1 has a card. Follow Yes to pick a card, increase Count and move the card to Pile 2. Follow the back arrow to test again. Follow No to End. The final Count is the answer.
The essential rule is that a completed visit updates the intended state and removes or marks that card before the next visit. In the lecture’s count diagram, moving the card comes before incrementing; our diagram increments then moves. Both give the same count when both actions complete once per card.
Turn a counting chart into a summing chart
Replace Count ← 0 with Sum ← 0. Replace Count ← Count + 1 with Sum ← Sum + X.mathsMarks. The loop test and the card movement stay the same. This is pattern reuse: change the work done per record, not the entire structure.
Read the empty and one-card cases
For no cards, the first decision is No, and Count stays 0. For one card, there is one Yes traversal, one increment and one move; the next test is No. These tiny examples are an effective way to detect an incorrect loop.
Try it yourself
Which shape should contain “X.mathsMarks > 50?”
Show explained answer
A decision diamond. The comparison produces True or False and chooses a path.
Try it yourself
Which shape should contain “Sum ← Sum + 50”?
Show explained answer
A process rectangle, because it changes a stored value.
Try it yourself
Why test for more cards before picking one?
Show explained answer
The original pile can be empty, including before the first visit. You cannot pick a card that is not there.
Try it yourself
If the return arrow goes to Count ← 0, what is wrong?
Show explained answer
It reinitializes the counter every time and erases progress. The return arrow should go to the card-availability test, after initialization.
Source: Lecture 1.4 — Introduction to flowcharts. Small teaching datasets and diagrams are prepared for these notes; lecture and tutorial totals are identified explicitly.