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Line 808:
console.log(2 + 6); // displays 8
// Adding a number and a string results in concatenation (from left to right)
console.log(2 + '2'); // displays 22
console.log('$' + 3 + 4); // displays $34, but $7 may have been expected
Line 814:
console.log(3 + 4 + '7'); // displays 77, numbers stay numbers until a string is added
// Convert a string to a number using the unary plus
console.log(+'2' === 2); // displays true
console.log(+'Hello'); // displays NaN
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