If an expression involving the Boolean & operator is evaluated, both operands areevaluated. Then the & operator is applied to the operand.
When an expression involving the && operator is evaluated, the first operand is evaluated. If the first operand returns avalue of true then the second operand is evaluated. The && operator is then applied to the first and second operands. If the first operand evaluates to false, the evaluation of the second operand is skipped.
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