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Example code of tetthys/bc

Informations about the package bc

System Requirements

Bc

Bc is a small and simple but accurate tool for calculation. It uses bcmath functions internally.

You can get the exact result you want.

There are no rounding issues if you have enough memory.

It's like calculating to N decimal places using a pen and paper with your hands.

Why Bc?

Do you think below test will pass?

Unfortunately, 0.1 + 0.2 is not 0.3 in php

It fails for the following reason:

Failed asserting that 0.30000000000000004 is identical to 0.3.

That's why I made this.

Usage Examples

Calculation

After giving a scale value, you can calculate in order.

It also can be used like below:

Comparison

After giving a scale value, you can compare.

It also can be used like below:

About num method

It specifies a number at which the calculation begins. It always returns Bc instance.

Or you can use the below instead:

About scale method

It specifies a scale value to be passed on to a next operation. The default value is 0.

It supports chaining:

Supported Calculation Methods

Calculation methods expect string or Bc instance. And they always return Bc instance.

add

It adds a number

sub

It subtracts a number

mul

It multiplies a number

div

It divides a number

mod

It calculates the modulus of a number

pow

It calculates the power of a number

powmod

It calculates the power of a number with modulus

sqrt

It calculates the square root of a number

Supported Comparison Methods

Comparison methods expect string or Bc instance. And they always return bool.

isGreaterThan

It checks if a number is greater than another number

isGreaterThanOrEqual

It checks if a number is greater than or equal to another number

isLessThan

It checks if a number is less than another number

isLessThanOrEqual

It checks if a number is less than or equal to another number

isEqual

It checks if a number is equal to another number

isDifferent

It checks if a number is different from another number

gt

Same as isGreaterThan

gte

Same as isGreaterThanOrEqual

lt

Same as isLessThan

lte

Same as isLessThanOrEqual

is

Same as isEqual

isNot

Same as isDifferent

Runtime Exceptions

ScaleCannotBeUsedForOperation

This is thrown when scale is less than 0.

ValueCannotBeUsedForOperation

This is thrown when value is not a number.

How to contribute and test in same environment?

docker-compose up

attach shell to phptestenv container

install dependencies with composer

run test

Or, you can run test from host OS using

What I want to say

It is currently June 2024.

I'm still learning commit and branch naming conventions and php composer rules.

I hope you understand even if some of the names are bad.

Thank you.

All versions of bc with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
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