Les opérateurs conditionnels en JavaScript sont essentiels pour la prise de décision dans le code. Ils permettent d'exécuter différentes actions en fonction de conditions variables.
La déclaration if
est l'opérateur conditionnel le plus fondamental, utilisé pour exécuter un bloc de code uniquement si une condition spécifiée est vraie.
Syntaxe:
Exemple:
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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La déclaration else
complète la déclaration if
, permettant l'exécution du code lorsque la condition if
est fausse.
Syntaxe:
if (condition) {
} else {
}
Exemple:
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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else if
permet de tester plusieurs conditions en séquence.
Syntaxe:
if (condition1) {
} else if (condition2) {
} else {
}
Exemple:
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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L'opérateur ternaire est un raccourci pour la déclaration if...else
, utile pour attribuer des valeurs en fonction d'une condition.
Syntaxe:
let result = (condition) ? value1 : value2;
Exemple:
let message = (temperature > 30) ? "It's a hot day" : "It's not a hot day";
Maîtriser les opérateurs conditionnels en JavaScript est crucial pour créer un code dynamique et interactif. Ces opérateurs permettent au script de prendre des décisions et de réagir différemment sous diverses conditions.