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PSeInt Segun (switch): choose between several options

Picks one path out of many depending on a variable's value, like a menu. Tidier than chaining many Si blocks when you compare the same variable with several values.

Group:
Structures
Template
Segun
Open it in Codoritmo

Opens the editor with this example loaded. Run it step by step and watch the flowchart.

Worked example

A complete algorithm, ready to copy and run.

segun-switch.psc · 8 lines
Algoritmo Example    opcion <- 2    Segun opcion Hacer        1: Escribir "Play"        2: Escribir "Quit"        De Otro Modo: Escribir "Not an option"    FinSegunFinAlgoritmo

Output

With opcion 2 it shows "Quit".

This is what the console shows when the example runs.

Quit

Common mistake

De Otro Modo catches any value that isn't listed.

In a flowchart

This is how it appears in a flowchart, with the same shapes Codoritmo draws.

opcion12De Otro Modo
In the flowchart. Flowchart: a multiple-choice diamond on "opcion" with three exits: 1, 2 and De Otro Modo (otherwise).
Draw the flowchart of your own algorithm →

Template

The general form. Replace what's inside < > with your own data.

Segun · 6 lines
Segun <expresion> Hacer  <valor>:    <acciones>  De Otro Modo:    <acciones>FinSegun

Examples that use it

Programs from the example library where it appears, from the simplest to the most complete.

  • Coffee Shop Menu

    Pick a drink from the menu and get the total to pay.

    Beginner

  • Count Vowels

    Counts the vowels, spaces and other characters in a text.

    Intermediate

  • Modular Menu

    A unit converter with a menu that keeps coming back.

    Intermediate

  • ATM

    Checks your PIN and lets you check, deposit and withdraw money.

    Advanced

  • Contact Book

    Add, list and search contacts in a book that grows.

    Advanced
See every Segun example →

More structures

Codoritmo is an independent, open-source project inspired by PSeInt and compatible with its syntax. It is not affiliated with the PSeInt project. Official PSeInt website.