tableswitch和lookupswitch都用于switch条件跳转，前者用于case值连续，例如上面代码中的0、1、2；后者用于case值不连续。从字节码可以看出：switch中的case条件和对应代码块是分开的。如上图，case为0时，跳转到标号28代码处；为1时跳转到标号35代码处；为2时跳转到标号43代码处；default则跳转
switch (expression) { case value: statement break; case value: statement break; case value: statement break; default: statement } switch 语句中的每一种情形(case)的含义是:“如果表达式等于这个值(value),则执行后面的 语句(statement)”。而break 关键字会导致代码执行流跳出switch 语句。 可以在switch ...
The syntax of switch statement is: switch (variable/expression) { case value1: // Statements executed if expression(or variable) = value1 break; case value2: // Statements executed if expression(or variable) = value1 break; ... ... ... ... ... ... default: // Statements executed...
cout << szChEntered << "b\n"; break; default: // Value of szChEntered undefined. cout << szChEntered << "neither a nor b\n"; break; } } A switch statement can be nested. When nested, the case or default labels associate with the closest switch statement that encloses them.Micr...
switch : A compound statement This statement is used when we have to select one choice from multiple choices on the basis of the value of some variable. Syntax for switch statement: switch(expression/condition) { case 1: statements; [break;] case 2: statements; [break;] default: statements...
intnum=1;switch(num){case1:System.out.println('One');case2:System.out.println('Two');break;default:System.out.println('Not one or two');}#Output:#'One'#'Two' Java Copy In this example,numis 1, which matches the first case. However, because there’s no break statement after the ...
Here is the same functionality, but using aswitchstatement instead: switch ($var) { case 0: echo "$var equals 0"; break; case 1: echo "$var equals 1"; break; case 2: echo "$var equals 2"; break; default: echo "i is not equal to 0, 1, or 2"; ...
default: result = "unknown animal"; break; } return result; } We compare theswitchargumentanimalwith the severalcasevalues. If none of thecasevalues is equal to the argument, the block under thedefaultlabel is executed. Simply put, thebreakstatement is used to exit aswitchstatement. ...
The switch statement allows us to execute a block of code among many alternatives. Syntax: switch (expression) { case value1: // code break; case value2: // code break; ... ... default: // default statements } How does the switch-case statement work? The expression is evaluated once...
You attempted to use thedefaultstatement more than once within a switch statement. The default case is always the last case statement in a switch statement (it is the fall-through case). To correct this error Remove any extradefaultcase statements from yourswitchstatement (use at mo...