What will be printed out as a result of the follow

What will be printed out as a result of the following code execution:

int i = 2;
switch (i) {
    case 0: cout << 0;
    case 1: cout << 1;
    case 2: 
    case 3: cout << 3;
    default: cout << 4;
}

Explanation

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switch-statement

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