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February 28, 2019 02:41
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斐波那契数列
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| function fn(n) { | |
| if (n < 1) { | |
| return 0 | |
| } | |
| if (n === 1) { | |
| return 1 | |
| } | |
| if (n === 2) { | |
| return 2 | |
| } | |
| var a = 1 | |
| var b = 2 | |
| var temp = 0 | |
| for (var i = 3; i <= n; i++) { | |
| temp = a + b | |
| a = b | |
| b = temp | |
| } | |
| return temp | |
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| function fn(n) { | |
| if (n < 1) { | |
| return 0 | |
| } | |
| if (n === 1) { | |
| return 1 | |
| } | |
| if (n === 2) { | |
| return 2 | |
| } | |
| return fn(n - 1) + fn(n - 2) | |
| } |
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