Communications of the ACM

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Evaluating numbers expressed as strings of English words

By Charles J. Swift
Communications of the ACM, October 1960, Vol. 3 No. 10, Page 541
10.1145/367415.367431
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Integer numbers can be expressed in English by a series of words such as “one hundred thirty three million two hundred four.” The process indicated by the accompanying flowchart evaluates numbers represented by such a string. To include words up to “billion” requires four terms “Sumi.” The multiplications can be done by shifting on a decimal machine.

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