# eCalculator

Author(s):

**Features**

Basic Operations:

Input expression, press ENTER or click the R button.

Press ESC to clear the input text.

Press UP/DOWN to select history input.

Click the result number to put it to input text.

Numbers:

Decimal by default.

Prefix 0b for binary.

Prefix 0x for hex.

Underscore _ can be in a number ( exp. 10_000 ).

Currently supported operators

Basic:

+ : Plus (+)

- : Minus (−)

* : Times (×)

/ : Divide (÷)

% : Module

Extanded:

** : Power

// : Integer Divide

Bitwise (integers only):

~ : Bitwise NOT

& : Bitwise AND

| : Bitwise OR

^ : Bitwise XOR

Logical (true = 1, false = 0):

! : Logical NOT

&& : Logical AND

|| : Logical OR

Relational (true = 1, false = 0):

== : Equal

!= : Not equal

> : Greater than

< : Less than

>= : Greater than or Equal to

<= : Less than or Equal to

Quest (lazy version):

condition ? true value : false value

for exp.

1 >= 2 ? 10 : 20 => 20

1 ? 2 ? 3 : 4 : 5 ? 6 : 7 = 1 ? (2 ? 3 : 4) : (5 ? 6 : 7)

Operator Orders

Use ( and ) to promote orders.

1 **

2 * / % //

3 + -

4 ~ & | ^

5 ! && ||

6 == != > < >= <=

7 ? :

Variable, Constants and Functions

Assign Variable:

= a = ...

a = b = 3 => a = (b = 3)

a = 1 + (b = 2) => a = 3, b = 2

[*] A variable could be assigned to a function.

Constants:

E: 2.7182818...

PI: 3.1415926...

Functions:

abs: absolute value

ln: log based on E

lg lg10 log10: log based on 10

lg2 log2: log based on 2

log: log(number, base)

sin, cos, tan/tg, ctan/ctg: Triangle functions

ord/chr: convert between char and code.

signed/unsigned: convert interger to signed/unsigned.

**Change Log**

[0.5]

+ support input history (uses localStorage)

+ Options

+ functions: signed, unsigned

! fixed: negative integer bitwise operators bug.

* UI changes

[0.4]

+ functions: abs, ord, chr

! fixed: ~ < <= ?: operators bug

* UI changes

#### Download files:

ecalculator-0.1.1-signed.xpi

ecalculator-0.4.1-signed.xpi

ecalculator-0.5.1-signed.xpi

ecalculator-0.5.1.1-signed.xpi

ecalculator-0.6.1-signed.xpi

ecalculator-0.7.0.xpi

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