134 lines
2.2 KiB
Markdown
134 lines
2.2 KiB
Markdown
---
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title: For Loop
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localeTitle: En bucle
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---
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# En bucle
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El bucle for ejecuta un bloque de código repetidamente hasta que una expresión condicional especificada se evalúa como falsa.
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Anatomía del bucle for:
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```
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for (initialization; condition; iterator)
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{
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body
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}
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```
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* Inicialización: la (s) declaración (es) de inicialización establece la condición inicial y se ejecuta solo una vez antes de ingresar al cuerpo del bucle.
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* condición: expresión booleana que determina si el cuerpo del bucle debe ejecutarse de nuevo o si el bucle debe salir.
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* iterador: se ejecuta después de cada iteración del cuerpo del bucle.
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### Ejemplo 1
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```
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for (int i = 0; i < 5; i++)
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{
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Console.WriteLine("Number " + i);
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}
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```
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### Salida:
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```
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> Number 0
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> Number 1
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> Number 2
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> Number 3
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> Number 4
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```
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### Ejemplo 2
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```
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int j = 0;
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for (int i = 0; j < 5; i++)
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{
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Console.WriteLine("Numbers {0} {1}", i, j);
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j++;
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}
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```
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### Salida:
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```
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> Numbers 0 0
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> Numbers 1 1
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> Numbers 2 2
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> Numbers 3 3
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> Numbers 4 4
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```
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### Ejemplo 3 - Simplificación del Ejemplo 2
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```
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for (int i = 0, j = 0; i < 5 && j < 5; i++, j++)
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{
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Console.WriteLine("Numbers {0} {1}", i, j);
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}
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```
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### Salida:
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```
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> Numbers 0 0
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> Numbers 1 1
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> Numbers 2 2
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> Numbers 3 3
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> Numbers 4 4
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```
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### Ejemplo 4
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```
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for (int i = 5; i > 0; i--)
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{
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Console.WriteLine("Number " + i);
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}
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```
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### Salida:
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```
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> Number 5
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> Number 4
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> Number 3
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> Number 2
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> Number 1
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```
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### Ejemplo 5
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```
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// Infinite loop - The loop body is executed infinitely
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for (; ;)
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{
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Console.WriteLine("The universe is infinite");
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}
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// Anything after infinite loop is reported as "Unreachable code detected" in Visual Studio
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Console.WriteLine("Never considered for execution");
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```
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### Salida:
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```
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> The universe is infinite
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> The universe is infinite
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> The universe is infinite
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> ....
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> ....
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```
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### Ejemplo 6
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```
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int i = 0;
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for (; i < 5;)
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{
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Console.WriteLine("Number " + i);
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i++;
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}
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```
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### Salida:
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```
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> Number 0
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> Number 1
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> Number 2
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> Number 3
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> Number 4
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```
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### Otros recursos
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* [Documentación de Microsoft](https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/for)
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## Fin |