Countiny

Tiny script for counting examples of several math situations. All functions expect valid input.

It's possible to include it directy:

<script src="http://pesout.github.io/countiny.js/countiny.js"></script>

Features

Quadratic formula

countiny_quad(a, b, c, x);

• A, B and C - Coefficients
• X - A root number (1 or 2)

Combinatorics

Factorial

countiny_fctr(a);

Cobmination number

countiny_comb(n, k);

• Numerator: n!
• Denominator: k! * (n-k)!

Variation

countiny_vari(n, k);

• Numerator: n!
• Denominator: (n-k)!

Logarithmic

Arbitary-based logarithm

countiny_alog(a, x);

• Base: a
• Argument: x
• Numerator: log(x)
• Denominator: log(a)

Roots

N-th root

countiny_root(x, n);

• 

Angles

Degrees to radians

countiny_dgrd(deg);

Degrees to radians expressed in multiples of pi

countiny_dgrd_pi(deg, pi_sign);

• deg - input
• pi_sign: logic variable (true or false)
• If pi_sign is true, output will look like 2π
• If not, output will look like 2

Radians to degrees

countiny_rddg(rad);

Percentage

• a - A whole number
• b - A value of percentages
• c - A part of a whole number

A part of a whole number and a value of percentages (of this part)

countiny_perc_part(a, b);

A whole number from a part and a value of percentages

countiny_perc_whol(b, c);

Percentages, which means a part of the whole number

countiny_perc_pers(b, c);

Is a number in a range?

countiny_rang(a, min, max);

• a - the number
• min - minimal value in the range
• max - maximal value in the range
• This function returns true or false

Rounding

Rounding to N decimal places

countiny_nrnd(num, dec);

• num - an input number
• dec - how many decimal places