How does this code's logic work?
boolean left = printLevel(root.left, level - 1);
boolean right = printLevel(root.right, level - 1);
return left || right;
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Giorgi Tsiklauri
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Deep Rakholiya
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Seems like a logic of tree, `||` Called Logical OR Operator. If any of the two boolean are true, then it becomes true. – Eklavya Oct 10 '20 at 05:34
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It is legal Java code. You will need to either give us more code and explanation or decide if it is logical yourself. – NomadMaker Oct 10 '20 at 05:46
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What `left || right` actually "means", beyond the literal definition of the `||` operator, depends on what a `true` or `false` result from `printLevel` means. – Kevin Anderson Oct 10 '20 at 05:55
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i understood thaks @Eklavya-UpvoteDon'tSayThanks – Deep Rakholiya Dec 04 '20 at 06:41
2 Answers
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It returns the boolean result of your expression.
For example, return false || true; would first evaluate "false || true", and then it will return the result of that evaluation, which is true, according to the truth table.
Giorgi Tsiklauri
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The method printLevel returns result in boolean format: true or false based on the input provided.
The results of the method printLevel execution is stored to the variables left and right available in the 1st and 2nd line of the sample code you provided.
Now, || is doing logical OR operation in the 3rd line. Which works following way:
true || false --> true
true || true --> true
false || true --> true
false || false --> false
Tahmid Ali
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