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Exercise 12

What value does the following expression evaluate to?

'12' < '9'

Solution

This question is a bit tricky: the expression evaluates as true since the operands are strings, not numbers. When you compare two strings, JavaScript performs a character-by-character comparison going from left to right, so on the first comparison, it determines that '1' < '9', so '12' must be less than '9'.'

Had you used numbers instead, the expression would evaluate as false.

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