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Sequence Flowcharts
Draw algorithms whose steps simply run one after another: input, process, output.
Sequence: One Step After Another
In a sequence, every step happens once, in order, from top to bottom. There are no decisions and no repeats. Most sequence flowcharts follow the pattern Start → Input → Process → Output → Stop.
Example 1 — the cost of one item
Read this flowchart as text
- Terminator: Start (then → INPUT price, quantity)
- Input/output: INPUT price, quantity (then → total = price × quantity)
- Process: total = price × quantity (then → OUTPUT total)
- Input/output: OUTPUT total (then → Stop)
- Terminator: Stop
The same algorithm in pseudocode (you will learn this later)Pseudocode
BEGIN INPUT price, quantity total ← price × quantity OUTPUT totalENDExample 2 — Temperature Conversion
Celsius to Fahrenheit
Read this flowchart as text
- Terminator: Start (then → INPUT celsius)
- Input/output: INPUT celsius (then → fahrenheit = celsius × 9 ÷ 5 + 32)
- Process: fahrenheit = celsius × 9 ÷ 5 + 32 (then → OUTPUT fahrenheit)
- Input/output: OUTPUT fahrenheit (then → Stop)
- Terminator: Stop
Example 3 — Several Processes
Practice
Which order is correct for a sequence flowchart?
More lessons in Algorithms, Flowcharts and Pseudocode · Next: Selection Flowcharts · Previous: Flowchart Symbols