Created
November 22, 2018 21:49
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Sum numbers 1 to n
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| //You: | |
| func sumFromOne(upto n: Int) -> Int { | |
| var result = 0 | |
| for i in 1...n { | |
| result += i | |
| } | |
| return result | |
| } | |
| sumFromOne(upto: 10) | |
| //The guy she told you not to worry about | |
| func sumFromOne(upto n: Int) -> Int { | |
| return (n + 1) * n / 2 | |
| } | |
| sumFromOne(upto: 10) |
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