diff --git a/fibonacci.ts b/fibonacci.ts
new file mode 100644
index 00000000..adb22c5a
--- /dev/null
+++ b/fibonacci.ts
@@ -0,0 +1,39 @@
+/**
+ * A function to get Fibonacci value of given number
+ * @param number The input integer
+ * @return {number} Fibonacci value of `number`
+ * @example fibonacciValue(4) => 3 | fibonacciValue(6) => 8
+ * @see https://en.m.wikipedia.org/wiki/Fibonacci_number
+ * @author MohdFaisalBidda <https://github.com/MohdFaisalBidda>
+ */
+
+
+try {
+  const fibonacciValue = (number: number): number => {
+    if (number == 0) {
+      return 0;
+    }
+
+    if (number < 0) {
+      return "Number should be greater than 0";
+    }
+
+    let a = 0;
+
+    let b = 1;
+
+    for (let i = 1; i < number; ++i) {
+      const c = a + b;
+
+      a = b;
+
+      b = c;
+    }
+
+    return b;
+  };
+} catch (error) {
+  console.log("Input must be a number");
+}
+
+
diff --git a/tsconfig.json b/tsconfig.json
index 3b8b39aa..9db2777d 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -17,4 +17,4 @@
     "strictFunctionTypes": true,              /* Visit https://aka.ms/tsconfig to read more about this file */        /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
     "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
   }
-}
+}
\ No newline at end of file