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Java If Boolean Example Solution Code 1

Video [フレーム]

See also:

• Java If Boolean Example Solution Code 2 (video)
• Java If Boolean Logic

• Syntax refresher:
• return true; -- return true immediately
• if (a > 20) { ... }
• && -- and
• || -- or (vertical bars)
• ! -- not (exclamation mark

• if (a <= 10 && b >= 20) {
   // run here if above is true
  }

sumDouble Solution

CodingBat Practice> sumDouble

• Value in local variable: int sum = a + b;
• if/else solution vs. last-return solution

sleepIn Solution

CodingBat Practice> sleepIn

• No: (vacation == true) Yes: (vacation)
• One strategy: return false; last, "fall through" past other cases above.

monkeyTrouble Solution

CodingBat Practice> monkeyTrouble

• Direct translation "both smiling": if (aSmile && bSmile) {
• Reduce the whole thing to one line:
  return (aSmile && bSmile || !aSmile && !bSmile);

More problems to try

• CodingBat Practice> parrotTrouble

• CodingBat Practice> posNeg

• CodingBat Practice> dif21

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