Solution 7

src/bin/problem_7.rs

@@ -0,0 +1,37 @@
+fn main() {
+    let result = nth_prime(10001);
+    println!("Result: {}", result.unwrap());
+}
+
+fn nth_prime(nth: i64) -> Option<i64> {
+    let mut primes: Vec<i64> = vec![2];
+
+    let mut i = 3;
+
+    while primes.len() < nth as usize {
+        let mut is_prime = true;
+        for prime in primes.clone() {
+            if i % prime == 0 {
+                is_prime = false;
+                break;
+            }
+        }
+        if is_prime {
+            primes.push(i);
+        }
+        i += 1;
+    }
+
+    return primes.pop();
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::nth_prime;
+
+    #[test]
+    fn it_works() {
+        let result = nth_prime(6);
+        assert_eq!(result.unwrap(), 13);
+    }
+}