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while loop

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while loop
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Führt eine Schleife .
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Executes a loop.
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Dort eingesetzt, wo Code muss mehrmals ausgeführt werden, während eine Bedingung vorhanden ist .
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Used where code needs to be executed several times while some condition is present.
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Inhaltsverzeichnis

[Bearbeiten] Syntax

while ( cond_expression ) loop_statement

[Bearbeiten] Erklärung

cond_expression sind ein Ausdruck, dessen Ergebnis ist konvertierbar bool sein. Es wird vor jeder Ausführung loop_statement, die nur ausgeführt wird, wenn die cond_expression ausgewertet true ausgewertet .
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cond_expression shall be an expression, whose result is convertible to bool. It is evaluated before each execution of loop_statement, which is only executed if the cond_expression evaluates to true.
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Wenn die Ausführung der Schleife muss irgendwann beendet werden kann <div class="t-tr-text"> break-Anweisung
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break statement
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als beendende Anweisung verwendet werden .
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If the execution of the loop needs to be terminated at some point,
break-Anweisung
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break statement
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</div> can be used as terminating statement.
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Wenn die Ausführung der Schleife muss am Ende der Schleife fortgesetzt werden kann <div class="t-tr-text"> continue-Anweisung
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continue statement
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als Abkürzung verwendet werden .
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If the execution of the loop needs to be continued at the end of the loop body,
continue-Anweisung
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continue statement
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</div> can be used as shortcut.
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[Bearbeiten] Keywords

while

[Bearbeiten] Beispiel

#include <iostream>
 
int main()
{
    int i = 0;
    while (i < 10) i++;
 
    std::cout << i << '\n';
 
    int j = 2;
    while (j < 9) {
        std::cout << j << " ";
        j += 2;
    }
}

Output: 

10
2 4 6 8
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/language/while&oldid=27127“