Created
March 22, 2022 06:02
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Fibonacci numbers
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function fib(value: number): number { | |
let first = 0; | |
let second = 1; | |
if (value <= 2) { | |
return value === 1 ? first : second; | |
} | |
let retValue = 0; | |
for (let i = 3; i <= value; i++) { | |
retValue = first + second; | |
first = second; | |
second = retValue; | |
} | |
// 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, | |
return retValue; | |
} | |
console.log(fib(1) === 0); | |
console.log(fib(2) === 1); | |
console.log(fib(3) === 1); | |
console.log(fib(4) === 2); | |
console.log(fib(5) === 3); | |
console.log(fib(6) === 5); | |
console.log(fib(7) === 8); | |
console.log(fib(16) === 610); |
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