--- a/README.md	Sat Nov 20 18:04:06 2021 +0100
+++ b/README.md	Sat Nov 20 18:47:17 2021 +0100
@@ -27,7 +27,12 @@
 
 #### Command
 ```bash
-fbs --spot-price=20.00 --exercise-price=21.00 --risk-free-rate=0.05 --std=0.25 --expiration=0.5
+fbs \
+--spot-price=20.00 \
+--exercise-price=21.00 \
+--risk-free-rate=0.05 \
+--std=0.25 \
+--expiration=0.5
 ```
 
 #### Output
@@ -36,4 +41,6 @@
 ---------------------------------------------
 European call option price: 1.197698084193286
 ---------------------------------------------
+European put option price: 1.6792062367882679
+---------------------------------------------
 ```
\ No newline at end of file

--- a/setup.cfg	Sat Nov 20 18:04:06 2021 +0100
+++ b/setup.cfg	Sat Nov 20 18:47:17 2021 +0100
@@ -1,6 +1,6 @@
 [metadata]
 name = fucking-black-scholes
-version = 0.0.2
+version = 0.0.3
 author = Dennis Concepcion Martin
 author_email = dennisconcepcionmartin@gmail.com
 description = A simple command line tool for pricing options using the Black-Scholes model

--- a/src/fbs/helpers.py	Sat Nov 20 18:04:06 2021 +0100
+++ b/src/fbs/helpers.py	Sat Nov 20 18:47:17 2021 +0100
@@ -27,13 +27,26 @@
     def compute_eu_call_price(self):
         """
         Determine the value of an European call option
-        :return:
+        :return: float
         """
 
         d1 = self.compute_d1()
         d2 = self.compute_d2()
 
-        price = self.s * norm.cdf(d1) - self.k * math.exp(- self.r * self.t) * norm.cdf(d2)
+        price = self.s * norm.cdf(d1) - self.k * math.exp(-self.r * self.t) * norm.cdf(d2)
+
+        return price
+
+    def compute_eu_put_price(self):
+        """
+        Determine the value of an European put option
+        :return: float
+        """
+
+        d1 = self.compute_d1()
+        d2 = self.compute_d2()
+
+        price = self.k * math.exp(- self.r * self.t) * norm.cdf(-d2) - self.s * norm.cdf(-d1)
 
         return price
 
@@ -60,3 +73,21 @@
         d2 = d1 - self.std * np.sqrt(self.t)
 
         return d2
+
+
+def format_output(text, price):
+    """
+    Format output to print to terminal
+    :param text: string, required
+    :param price: float, required
+    :return: string, string
+    """
+
+    output = '{}: {}'.format(text, price)
+    output_length = len(output)
+    line = ''.join('-' for _ in range(output_length))
+
+    return line, output
+
+
+

--- a/src/fbs/main.py	Sat Nov 20 18:04:06 2021 +0100
+++ b/src/fbs/main.py	Sat Nov 20 18:47:17 2021 +0100
@@ -1,5 +1,6 @@
 import click
 from fbs.helpers import Option
+from fbs.helpers import format_output
 
 
 @click.command()
@@ -11,14 +12,23 @@
 def cli(spot_price, exercise_price, risk_free_rate, std, expiration):
     option = Option(spot_price, exercise_price, risk_free_rate, std, expiration)
 
-    # Format output
-    output = 'European call option price: {}'.format(option.compute_eu_call_price())
-    output_length = len(output)
-    line = ''.join('-' for _ in range(output_length))
+    line, call_output = format_output(
+        text='European call option price',
+        price=option.compute_eu_call_price()
+    )
 
-    # Output
+    _, put_output = format_output(
+        text='European put option price',
+        price=option.compute_eu_put_price()
+    )
+
+    # Output call
     click.echo(line)
-    click.echo(output)
+    click.echo(call_output)
+
+    # Output put
+    click.echo(line)
+    click.echo(put_output)
     click.echo(line)
 
 

--- a/tests/test_helpers.py	Sat Nov 20 18:04:06 2021 +0100
+++ b/tests/test_helpers.py	Sat Nov 20 18:47:17 2021 +0100
@@ -17,6 +17,12 @@
 
         self.assertEqual(price, 1.20, 'EU call price is not equal to 1.20')
 
+    def test_compute_eu_put_price(self):
+        price = self.option.compute_eu_put_price()
+        price = round(price, 2)
+
+        self.assertEqual(price, 1.68, 'EU put price is not equal to 1.68')
+
     def test_compute_d1(self):
         d1 = self.option.compute_d1()
         d1 = round(d1, 2)