Create first_recurring_character.py

Author: Amogh Singhal

first_recurring_character.py

@@ -0,0 +1,16 @@
+def first_recurring_character(input):
+    flag = None
+    d = dict()
+    for char in input:
+        if char in d.keys():
+            flag = char
+            return flag
+        d[char] = 1
+    return flag
+    
+result = first_recurring_character("DFGHJWERGBFGHJ")
+print(result)   # G
+result = first_recurring_character("ABCDEFGH")
+print(result)   # None
+result = first_recurring_character("12345642124345")
+print(result)   # 4