add endpoint for raising to the power

Author: matthewcadena

__tests__/utils/QueryProcessor.test.ts

@@ -45,4 +45,16 @@ describe("QueryProcessor", () => {
         const response: string = QueryProcessor(query);
         expect(response).toBe("4096");
     });
+
+    test("should return subtraction result for minus query", () => {
+        const query = "What is 120 minus 77?";
+        const response: string = QueryProcessor(query);
+        expect(response).toBe("43");
+    });
+
+    test("should return primes from list", () => {
+        const query = "Which of the following numbers are primes: 41, 85, 7, 59, 48?";
+        const response: string = QueryProcessor(query);
+        expect(response).toBe("41, 7, 59");
+    });
 });

utils/QueryProcessor.tsx

@@ -44,6 +44,19 @@ export default function QueryProcessor(query: string): string {
     return (left - right).toString();
   }
 
+  const powerMatch = query
+    .toLowerCase()
+    .match(/what is\s*(-?\d+)\s*to the power of\s*(\d+)\?/);
+  if (powerMatch) {
+    const base = BigInt(powerMatch[1]);
+    const exponent = Number(powerMatch[2]);
+    let result = BigInt(1);
+    for (let i = 0; i < exponent; i += 1) {
+      result *= base;
+    }
+    return result.toString();
+  }
+
   const largestNumbersMatch = query
     .toLowerCase()
     .match(/which of the following numbers is the largest:\s*(.+)\?/);