Added imply gate to boolean algebra

boolean_algebra/imply_gate.py

@@ -0,0 +1,40 @@
+"""
+An IMPLY Gate is a logic gate in boolean algebra which results to 1 if
+either input 1 is 0, or if input 1 is 1, then the output is 1 only if input 2 is 1.
+It is true if input 1 implies input 2.
+
+Following is the truth table of an IMPLY Gate:
+    ------------------------------
+    | Input 1 | Input 2 | Output |
+    ------------------------------
+    |    0    |    0    |    1   |
+    |    0    |    1    |    1   |
+    |    1    |    0    |    0   |
+    |    1    |    1    |    1   |
+    ------------------------------
+
+Refer - https://en.wikipedia.org/wiki/IMPLY_gate
+"""
+
+
+def imply_gate(input_1: int, input_2: int) -> int:
+    """
+    Calculate IMPLY of the input values
+
+    >>> imply_gate(0, 0)
+    1
+    >>> imply_gate(0, 1)
+    1
+    >>> imply_gate(1, 0)
+    0
+    >>> imply_gate(1, 1)
+    1
+    """
+    return int(input_1 == 0 or input_2 == 1)
+
+
+if __name__ == "__main__":
+    print(imply_gate(0, 0))
+    print(imply_gate(0, 1))
+    print(imply_gate(1, 0))
+    print(imply_gate(1, 1))