## Lesson Objective

- Understand and interpret the purpose of flowcharts and be able to use standard arithmetic operators.

1

KS3, GCSE, A-Level Computing Resources

- Understand and interpret the purpose of flowcharts and be able to use standard arithmetic operators.

Diagramatic way of displaying instructions to solve a problem. Algorithms can be broken down and displayed in the form of a flowchart.

Arithmetic Operation | Operator | Example |
---|---|---|

Addition | + | 5 + 5 = 10 |

Subtraction | - | 5 - 2 = 3 |

Multiplication | * | 4 * 2 = 8 |

Division | / | 8 / 4 = 2 |

Floor Division (Whole Num) | DIV | 22 DIV 4 = 5 |

Remainder Division | MOD | 22 MOD 4 = 2 |

Relational Operation | Operator | Example |
---|---|---|

Assignment | ← or = | a = 6 |

Equal or Comparison | = or == | IF a == 6 |

Less Than | < | IF a < 20 |

Less Than or Equal To | <= | IF a <= 20 |

Greater Than | > | IF a > 20 |

Greater Than or Equal To | >= | IF a >= 20 |

Not Equal | <> or != or ≠ | IF a ≠ 20 |

**Example Flowchart 1**

This algorithm models basic unique username creation.

**Example Flowchart 2**

The statement count = count + 1 means: "Add 1 to the variable called count"

3