Question

What's the output?

+true;
!'Lydia';

• A: 1 and false
• B: false and NaN
  • C: false and false

Answer 1

Answer: A

The unary plus tries to convert an operand to a number. true is 1, and false is 0.

The string 'Lydia' is a truthy value. What we're actually asking, is "is this truthy value falsy?". This returns false.

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