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switch (expr) { case expr1: statement case expr2: statement ... default: statement } |
The switch statement is similar to a series of if statements on the same expression. In many occasions, you may want to compare the same variable (or expression) with many different values, and execute a different piece of code depending on which value it equals to. This is exactly what the switch statement is for.
Concept does not support labels and goto. The switch implementation is a little different from the C standard switch, mainly because instead of constant values, you can have full expressions (any expression). |
switch (i) { case 0: echo "i is zero"; break; // notice the break statement to prevent execution of the next case label case 1: case 2: echo "i is one or two"; // if i is 1 or 2 this code will be executed break; case 2+1: // notice an expression here echo "i is 2 + 1"; break; case "test": // a string expression echo "i is 'test'"; // notice that is no break here case "somedata"+2: // if i is "test" this statement will be executed too echo "i is a string"; break; default: // if no value is found this will be executed. echo "i has another value"; // the default case is optional } |
Documented by Eduard Suica, generation time: Fri Jan 21 18:06:25 2011 GMT | (c)2011 RadGs Software |