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DSA · Theory

What is an algorithm

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Theory

3/810

What is an algorithm

an algorithm (what is) is a DSA topic. In plain words you use it for a short an algorithm what is example in a short dry-run on paper. Don’t start with a slogan — start with that picture.

Smallest example: the smallest an algorithm what is example you can type. Type it, run it, and say what you see. If you can do that from memory, you know an algorithm (what is).

From the example next to this theory — What is an algorithm: dry-run [4, 1, 3].

Trap — only saying “an algorithm what is” with no example. Fix that before you talk about advanced DSA.

Viva: what is an algorithm (what is)? Then show the smallest an algorithm what is example you can type. Then name the trap.

Exam tip

What is an algorithm (what is)? Show this: the smallest an algorithm what is example you can type. Trap: only saying “an algorithm what is” with no example.

Example

# What is an algorithm
data = [4, 1, 3]
print("start", data)
if data[0] > data[1]:
    data[0], data[1] = data[1], data[0]
print("after one step", data)

What is an algorithm: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • Defan algorithm (what is) — a short an algorithm what is example in a short dry-run on paper.
  • Rulethe smallest an algorithm what is example you can type
  • Traponly saying “an algorithm what is” with no example
  • Usea short dry-run on paper

Questions

1

What is an algorithm (what is)?

2

Give one small example of an algorithm (what is).

3

What mistake do beginners make with an algorithm (what is)?

4

Where do you use an algorithm (what is)?

3 / 810

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