Test Cornish plurals

cornish.js

/*
[zero 0]
0

[one 1]
1

[two 2]
2 and all numbers that end in 02, 22, 42, 62 and 82;
numbers that end with the following multiples of 1,000: 1,000-20,000, 40,000, 60,000,
80,000; numbers that end with a multiple of 100,000

[few 3]
3 and all numbers that end in 03, 23, 43, 63 and 83

[many 4]
all numbers that end in 01, 21, 41, 61 and 81

[other 5]
other: all other numbers
*/

plural = function (n) {
    return (n==0)
        	? 0
        	: (n==1)
        		? 1
        		: ((n%100==2 || n%100==22 || n%100==42 || n%100==62 || n%100==82) || ((n%1000==0 && n%100000>=1000 && n%100000<=20000) || (n%20000==0) && n%1000000!=0))
        			? 2
        			: (n%100==3 || n%100==23 || n%100==43 || n%100==63 || n%100==83)
        				? 3
        				: (n%100==1 || n%100==21 || n%100==41 || n%100==61 || n%100==81)
        					? 4
        					: 5;
}

/* Compact version for Pontoon
(n==0)?0:(n==1)?1:((n%100==2||n%100==22||n%100==42||n%100==62||n%100==82)||((n%1000==0&&n%100000>=1000&&n%100000<=20000)||(n%20000==0)&&n%1000000!=0))?2:(n%100==3||n%100==23||n%100==43||n%100==63||n%100==83)?3:(n%100==1||n%100==21||n%100==41||n%100==61||n%100==81)?4:5
*/
let output = 'Numbers from 0 to 99:\n';
for (let i = 0; i < 200; i++) {
    if (i!=0 && i%10==0) {
        output += '\n';
    }
    output += plural(i) + ',';
    if (i==99) {
        output += '\n\nNumbers from 100 to 199:';
    }
}

output += '\n\nSpecial cases:\n';
special_cases = [
    1000, 1435, 5000, 10000, 20000, 21000, 30000, 40000, 60000, 80000, 90000,
    100000, 110000, 115000, 130000, 140000, 150000, 180000, 208000,
    800000, 820000, 1100000, 56500000, 1000000, 1005000, 10000000, 1000000000,
]
for (let i of special_cases) {
    let n = i.toLocaleString(undefined)
    output += `${n}: ${plural(i)}\n`;
}

console.log(output);

output.txt

Numbers from 0 to 99:
0,1,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,

Numbers from 100 to 199:
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,
5,4,2,3,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,

Special cases:
1,000: 2
1,435: 5
5,000: 2
10,000: 2
20,000: 2
21,000: 5
30,000: 5
40,000: 2
60,000: 2
80,000: 2
90,000: 5
100,000: 2
110,000: 2
115,000: 2
130,000: 5
140,000: 2
150,000: 5
180,000: 2
208,000: 2
800,000: 2
820,000: 2
1,100,000: 2
56,500,000: 2
1,000,000: 5
1,005,000: 2
10,000,000: 5
1,000,000,000: 5