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What is Algorithms? ​

Explanation ​

An algorithm is a step-by-step procedure or set of instructions designed to solve a problem, accomplish a task, or perform a specific computation.

Why it's important ​

  • Problem solving
  • Decision making
  • Efficiency
  • Consistency

Example ​

  • Navigation App (ex: Google Maps)
  • Social Media Feed (ex: Instagram, TikTok)
  • Search Engine (ex: Google)
  • Online Shopping (ex: Amazon)

Written Description ​

A written description algorithm is a series of step-by-step instructions in plain language, describing how to solve a problem or perform a task.

Example
  1. Boil Water
  2. Prepare Tea Bag
  3. Pour Hot Water
  4. Steep Tea
  5. Remove Tea Bag
  6. Add Sweetener/Milk
  7. Stir and Enjoy

Pseudocode ​

Pseudocode is a detailed yet human-readable description of what a computer program or algorithm should do, resembling a mixture of natural language and programming constructs.

Keywords
  • Statement : BEGIN, END
  • Input : INPUT, GET, READ
  • Output : OUTPUT, PRINT, DISPLAY
  • Initialize : INITIALIZE, SET
  • Compute : COMPUTE, CALCULATE, ADD, SUM, SUBTRACT, MULTIPLY
  • Looping : WHILE, END-WHILE, FOR, END-FOR, DO-WHILE, END-DO
  • Selection : IF, END-IF
Example
txt
BEGIN
    INITIALIZE water, kettle, cup, teaBag, sugar
    INPUT water INTO kettle
    WHILE water is not boiling
      	DO
          	WAIT 1 minute
      	ENDDO
    ENDWHILE
    INPUT teaBag INTO cup
    INPUT sugar INTO cup
    INPUT water INTO cup
END

Flowchart ​

A flowchart is a graphical representation using various shapes and arrows to illustrate the steps of a process or algorithm.

Symbols

flowcharts symobls

Example

flowcharts symobls