create swapcase.py

strings/swapcase.py

@@ -0,0 +1,35 @@
+"""
+Example to show how this method works
+>>> swap_case("Hello")
+hELLO
+>>> swap_case("water")
+WATER
+
+"""
+
+
+def swap_case(input_string: str) -> str:
+    """This Method will swap the case of a given string
+    eg: input: input_string="book" output: swapped_string="BOOK"
+    """
+    list_representation = list(input_string)
+    for i in range(len(list_representation)):
+        if list_representation[i] >= "A" and list_representation[i] <= "Z":
+            m2 = ord(list_representation[i])
+            m1 = m2 + 32
+            list_representation[i] = chr(m1)
+        elif list_representation[i] >= "a" and list_representation[i] <= "z":
+            m3 = ord(list_representation[i])
+            m4 = m3 - 32
+            list_representation[i] = chr(m4)
+        else:
+            pass
+    swapped_list = "".join(list_representation)
+    return swapped_list
+
+
+if __name__ == "__main__":
+    # sample test
+    input_string = "Hello"
+    swapped_string = swap_case(input_string)
+    print(swapped_string)