where := is read as “becomes”; the symbol suggests a left-pointing arrow to signify the conveyance of a value to the variable on the left. Other languages (particularly Basic, C, and Fortran) use = as the assignment operator, e.g. a = b + c
This leads to problems in expressing the concept of equality. Basic, being an unsophisticated language, is able to use = for both purposes; C uses == for equality and Fortran uses .EQ.
"assignment statement." A Dictionary of Computing. . Encyclopedia.com. (August 17, 2018). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/assignment-statement
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