[Sync Iteration] go/nth-prime/1

solutions/go/nth-prime/1/nth_prime.go

@@ -0,0 +1,33 @@
+package prime
+
+import (
+    "math"
+    "errors"
+)
+
+// Nth returns the nth prime number. An error must be returned if the nth prime number can't be calculated ('n' is equal or less than zero)
+func Nth(n int) (int, error) {
+	if n <= 0 {
+        return 0, errors.New("")
+    }
+
+    var result int
+    var count int
+    for i := 2; count < n; i++ {
+        if is_prime(i) {
+            result = i
+            count++
+        }
+    }
+
+    return result, nil
+}
+
+func is_prime(n int) bool {
+    for i := 2; i <= int(math.Sqrt(float64(n))); i++ {
+        if n % i == 0 {
+            return false
+        }
+    }
+    return true
+}