function fact(n) {
if (n == 1) return 1;
return fact(n - 1) * n;
}
fact(1)
fact(2)
fact(3)
fact(4)
fact(5)
function factI(n) {
let res = 1;
for (let i = 1; i <= n; i++) {
res = res * i;
}
return res;
}
factI(5)
fact(10)
fact(20)
fact(21)
fact(22)
function factN(n) {
if (n == 1) return 1n;
return BigInt(n) * BigInt(fact(n - 1));
}
factN(21)
factN(22)
factN(30)
factN(100)
function pow(base, count) {
function multiply(n) {
if (n == 1) return base;
return base * multiply(n - 1);
}
return multiply(count);
}
pow(2,3)
pow(3,2)
function powS(base, count) {
function multiply(n) {
if (n == 1) return base;
if (n % 2 == 0) {
let p = multiply(n / 2);
return p * p;
}
return base * multiply(n - 1);
}
return multiply(count);
}
powS(2,10)
powS(2,20)
powS(2,30)
powS(2,40)
powS(2,50)
powS(2,60)
powS(2,70)
function powN(base, count) {
const bb = BigInt(base);
function multiply(n) {
if (n == 1) return bb;
if (n % 2 == 0) {
let p = multiply(n / 2);
return p * p;
}
return bb * multiply(n - 1);
}
return multiply(count);
}
powN(2,60)
powN(2,70)
powN(2,100)
powN(2,8000)
function factP(n) {
let m = [1n, 1n]
for (let i = 2; i <= n; i++) {
const res = BigInt(i) * m[i - 1];
m.push(res);
}
return m
}
factP(20)
function powP(base, n) {
const bb = BigInt(base)
let m = [1n, bb];
for (let i = 2; i <= n; i++) {
const res = bb * m[i - 1];
m.push(res);
}
return m;
}
powP(2,69)
powP(3,44)
powP(4,34)
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