Create Permutations_Combinations_generator.py

Permutations_Combinations_generator.py

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+from math import factorial  # Import the factorial function from the math module.
+
+# Function to calculate permutations (n choose r).
+def permutations(n, r):
+    # Use the factorial function to calculate the factorial of n and (n-r).
+    numerator = factorial(n)
+    denominator = factorial(n - r)
+
+    # Calculate and return the result as the ratio of the factorials.
+    result = numerator // denominator
+    return result
+
+# Function to calculate combinations (n choose r).
+def combinations(n, r):
+    # Use the factorial function to calculate the factorials of n, r, and (n-r).
+    numerator = factorial(n)
+    denominator = factorial(r) * factorial(n - r)
+
+    # Calculate and return the result as the ratio of the factorials.
+    result = numerator // denominator
+    return result