# euler / go / src / euler / 9.go

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37``` ```/* A Pythagorean triplet is a set of three natural numbers, a < b < c, for which, a^2 + b^2 = c^2 For example, 3^2 + 4^2 = 9 + 16 = 25 = 5^2. There exists exactly one Pythagorean triplet for which a + b + c = 1000. Find the product abc. Answer: 31875000 */ package main import "fmt" func isPythagorean(a, b, c int) bool { return a*a+b*b == c*c } func e9() { for a := 1; a < 1000; a++ { for b := 1; b < 1000; b++ { for c := 1; c < 1000; c++ { if a+b+c == 1000 && isPythagorean(a, b, c) { fmt.Println(a * b * c) return } } } } fmt.Println(isPythagorean(3, 4, 5)) } func init() { register("9", e9) } ```
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