Caluculator

Welcome to Calculator application.

An calculator is typically a portableelectronic device used to performcalculations, ranging from

basicarithmetic to complexmathematics.

Acalculator is a machine which allows people to domath operations more easily. For example,

most calculators willadd,subtract,multiply, anddivide. Some also dosquare roots, and more

complex calculators can help withcalculus and draw function graphs. Calculators are found

everywhere. Asmartphone or othercomputer can also act as a calculator.

Some calculators, like theabacus, will work withoutbatteries. Others, like the electronic

calculator, require batteries. There are two types of electronic calculators: simple calculators,

which can onlyadd,subtract,multiply anddivide, and sometimes takesquare roots; and

scientific calculators, which can do many other things, such as

calculatefactorials andtrigonometry functions.

There are different ways to write mathematics on a calculator. For example, after pressing "3"

and then "+" and then "2" and then "=" (or "ENTER") the number "5" will be displayed on the

screen. This is calledinfix notation. Many more advanced calculators usepostfix notation, that is,

"3 4 +" instead of "3 + 4 =". The third way of noting things, "+ 3 4", calledprefix notation, is rarely

found on calculators.