![]() If condition evaluates to a value that doesn't match any of the case: labels, and the default: label is not present, then none of the statements in the switch body is executed. If condition evaluates to a value that doesn't match any of the case: labels, and the default: label is present, control is transferred to the statement labeled with the default: label. If condition evaluates to a value that is equal to the value of one of constant-expressions, then control is transferred to the statement that is labeled with that constant-expression. At most one default: label may be present (although nested switch statements may use their own default: labels or have case: labels whose constants are identical to the ones used in the enclosing switch). However, if all your conditions are of the type x value with x being the same in every condition, switch usually makes sense. In an elseif statement, the condition is. The body of a switch statement may have an arbitrary number of case: labels, as long as the values of all constant-expressions are unique (after conversions/promotions). In a switch statement, the condition is evaluated only once and the result is compared to each case statement. case: and default: labels are permitted in statement and break statement has special meaning.Īttr (optional) case constant-expression : statementĪ constant expression of the same type as the type of condition after conversions and integral promotions ![]() If the (possibly converted) type is subject to integral promotions, condition is converted to the promoted type.Īny statement (typically a compound statement). The value of condition must be of integral or enumeration type, or of a class type contextually implicitly convertible to an integral or enumeration type. a declaration of a single non-array variable of such type with a brace-or-equals initializer, in this case the value of condition is the value of the declared variable.an expression, in this case the value of condition is the value of the expression.Meat could be chicken pork beef lamb Veggie could be. Note that any init-statement must end with a semicolon, which is why it is often described informally as an expression or a declaration followed by a semicolon. Is there a way to deal with multiple conditions in switch/case For example (this is just example). a simple declaration, typically a declaration of a variable with initializer, but it may declare arbitrarily many variables or structured bindings.an expression statement (which may be a null statement " ").Attr (optional) switch ( init-statement (optional) condition ) statement In computer programming languages, a switch statement is a type of selection control mechanism used to allow the value of a variable or expression to change.
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