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This notation was used inside IBM for short research reports on computer systems, such as the Burroughs B5000 and its stack mechanism when stack machines versus register machines were being evaluated by IBM for upcoming computers. Because an effective notation for the description of programs exhibits considerable syntactic structure, it is called a programming language. Such explicit procedures are called algorithms or programs. The preface states its premise:Īpplied mathematics is largely concerned with the design and analysis of explicit procedures for calculating the exact or approximate values of various functions. In 1960, he began work for IBM where he developed this notation with Adin Falkoff and published it in his book A Programming Language in 1962. Iverson, starting in 1957 at Harvard University. History Mathematical notation Ī mathematical notation for manipulating arrays was developed by Kenneth E. It has also inspired several other programming languages.

It has been an important influence on the development of concept modeling, spreadsheets, functional programming, and computer math packages. It uses a large range of special graphic symbols to represent most functions and operators, leading to very concise code. Its central datatype is the multidimensional array. Without proper rendering support, you may see question marks, boxes, or other symbols instead of APL symbols.ĪPL (named after the book A Programming Language) is a programming language developed in the 1960s by Kenneth E.

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