addded code for dictionary , tuples and did the exercise 1 on strings in python

Author: KDvs123

String in Python/exercise1.py

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+street="Walawwatta place"
+city="Colombo"
+country="Sri Lanka"
+
+address=street+" "+city+" "+country
+print(address)
+
+print(f"Street is {street} and city is {city} and country is {country}")

String in Python/exercise2.py

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+d={"Tom":734342343,"rob":21325245,"joe":3424234324}
+d
+{'Tom': 734342343, 'rob': 21325245, 'joe': 3424234324}
+d["Tom"]
+734342343
+
+# Changin the value in a dictionary
+
+d["sam"]=21321432523
+d
+{'Tom': 734342343, 'rob': 21325245, 'joe': 3424234324, 'sam': 21321432523}
+d["rob"]=132123123
+d
+{'Tom': 734342343, 'rob': 132123123, 'joe': 3424234324, 'sam': 21321432523}
+del d["sam"]
+d
+{'Tom': 734342343, 'rob': 132123123, 'joe': 3424234324}
+
+# displaying the dictionary values
+
+# 1. One way
+
+for key in d:
+    print("Key is: ",key," value is ",d[key])
+
+# 2. Two way
+
+for key , value in d.items():
+    print("Key is ",key, " Value is ",value)
+
+    
+# Search for a value in dictionary
+
+"tom" in d
+False
+"Tom" in d
+True
+
+# Wipe out the data in a dictionary
+
+d.clear()

String in Python/exercise3.py

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+point=(5,9)
+point[0]
+5
+point[1]
+9
+point[0:]
+(5, 9)
+# list: all the values have similar meaning (Homogeneous)
+#tuple: all values have different meaning (heterogeneous)
+
+#example  address=("100101","New york")
+#tuples are immumatable
+
+point[1]=0 #this will give me an error