Add coin-regiter module

Author: rjLelis

coin-register/REAME.md

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+# Coin register
+
+Code to manipulate coins value
+
+### Worked concepts
+
+* for loop
+* control flow

coin-register/coin_operations.py

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+def num_coins(cents):
+
+    ''' 
+        num_coins(33) == 5
+        33 => 1 quarter, 1 nickel, 3 pennies => 5 coins
+    '''
+
+    if cents <= 0:
+        return 0
+    remaning_coins = cents
+    number_of_coins = 0
+    for _ in range(cents):
+        if remaning_coins >= 50:
+            number_of_coins += 1
+            remaning_coins -= 50
+
+        elif remaning_coins >= 25:
+            number_of_coins += 1
+            remaning_coins -= 25
+
+        elif remaning_coins >= 10:
+            number_of_coins += 1
+            remaning_coins -= 10
+        
+        elif remaning_coins >= 5:
+            number_of_coins += 1
+            remaning_coins -= 5
+        
+        elif remaning_coins >= 1:
+            number_of_coins += 1
+            remaning_coins -= 1
+         
+
+    return number_of_coins