Calculator input methods

A simple four-function calculator program.

Screenshot of an RPN Calculator program on GNU+Linux.

$Scientific calculator displaying fractions and their decimal equivalents$

There are various ways in which calculators interpret keystrokes.

One can categorize calculators into two main types: 1) single-step or immediate execution calculators and 2) expression or formula calculators.

On a formula calculator one types in an expression and then presses 'Enter' to evaluate the expression. There are various systems for typing in an expression: infix, postfix, natural display, etc.

单词	VPAM
释义	VPAM 英语百科 Calculator input methods $Scientific calculator displaying fractions and their decimal equivalents$ There are various ways in which calculators interpret keystrokes. One can categorize calculators into two main types: 1) single-step or immediate execution calculators and 2) expression or formula calculators. On a formula calculator one types in an expression and then presses 'Enter' to evaluate the expression. There are various systems for typing in an expression: infix, postfix, natural display, etc.
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VPAM

Calculator input methods