What's the correct usage and difference between 'while' and 'whilst'?

Jul 14, 2015
A typewriter from above

When used as a conjunction whilst and while are completely interchangeable. While can also function as a noun where whilst cannot. In American English whilst is regarded as quaint or old-fashioned and rarely used. In British English both are used frequently with speakers often making use of both forms. In Australian English while is more common than whilst. Whilst seems to be regarded by some as more formal in register, and is, therefore often adopted in formal situations  by those who would usually use while.

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