# LegacyCollector

Home | Legacy Firefox Extensions | Content Policy | Contact

# 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

This page is part of the LegacyCollector website.

Disclaimer: All material on this site is property of their respective owners and available under

open licenses to the best of our knowledge. If you are an author and would like anything removed,

then please write an e-mail to **legacy [at] collector dot org**.