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PSeInt Repetir Hasta Que (repeat-until loop), with an example

Repeats a group of instructions and checks the condition at the end of each round, so it always runs at least once. Ideal for asking until the answer is valid.

Group:
Structures
Template
Repetir
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.

repetir-hasta-que-do-while.psc · 6 lines
Algoritmo Example    Repetir        Escribir "Type a positive number"        Leer n    Hasta Que n > 0FinAlgoritmo

Output

Keeps asking while you type 0 or negatives.

This is what the console shows when the example runs. What the user types is highlighted.

Type a positive numberUser answer: -3Type a positive numberUser answer: 0Type a positive numberUser answer: 7

Another example

repetir-hasta-que-do-while.psc · 5 lines
Algoritmo Example    Repetir        Leer clave    Hasta Que clave = "1234"FinAlgoritmo

Output

Keeps asking for the code until you type 1234.

This is what the console shows when the example runs. What the user types is highlighted.

User answer: 0000User answer: 1234

In a flowchart

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

…n > 0NoSí
In the flowchart. Flowchart: the body first, then a decision diamond with the condition "n > 0" below it; on No it repeats, on Sí (yes) it leaves.
Draw the flowchart of your own algorithm →

Template

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

Repetir · 3 lines
Repetir  <acciones>Hasta Que <condicion>

Examples that use it

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

  • Password Check

    Keeps asking for a password until it has at least 8 characters.

    Beginner

  • Reusable Validation

    Validates the email and age on a sign-up form.

    Intermediate

  • Quicksort

    Picks a pivot, splits smaller from larger values and sorts each side recursively.

    Advanced

  • Tic-Tac-Toe

    The classic three-in-a-row game for two players.

    Advanced

  • 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 Repetir 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.