added more questions

Author: xcao21

100+ Python challenging programming exercises.txt

@@ -766,6 +766,8 @@ def printValue(n):
 printValue(3)
 
 #----------------------------------------#
+2.10
+
 Question:
 Define a function that can receive two integral numbers in string form and compute their sum and then print it in console.
 
@@ -781,6 +783,9 @@ printValue("3","4") #7
 
 
 #----------------------------------------#
+2.10
+
+
 Question:
 Define a function that can accept two strings as input and concatenate them and then print it in console.
 
@@ -795,6 +800,9 @@ def printValue(s1,s2):
 printValue("3","4") #34
 
 #----------------------------------------#
+2.10
+
+
 Question:
 Define a function that can accept two strings as input and print the string with maximum length in console. If two strings have the same length, then the function should print al l strings line by line.
 
@@ -820,6 +828,8 @@ printValue("one","three")
 
 
 #----------------------------------------#
+2.10
+
 Question:
 Define a function that can accept an integer number as input and print the "It is an even number" if the number is even, otherwise print "It is an odd number".
 
@@ -839,22 +849,259 @@ checkValue(7)
 
 
 #----------------------------------------#
+2.10
+
 Question:
-Define a function that can accept an integer number as input and print the "It is an even number" if the number is even, otherwise print "It is an odd number".
+Define a function which can print a dictionary where the keys are numbers between 1 and 3 (both included) and the values are square of keys.
 
 Hints:
 
-Use % operator to check if a number is even or odd.
+Use dict[key]=value pattern to put entry into a dictionary.
+Use ** operator to get power of a number.
 
 Solution
-def checkValue(n):
-	if n%2 == 0:
-		print "It is an even number"
-	else:
-		print "It is an odd number"
+def printDict():
+	d=dict()
+	d[1]=1
+	d[2]=2**2
+	d[3]=3**2
+	print d
 
 
-checkValue(7)
+printDict()
+
+
+
+
+
+#----------------------------------------#
+2.10
+
+Question:
+Define a function which can print a dictionary where the keys are numbers between 1 and 20 (both included) and the values are square of keys.
+
+Hints:
+
+Use dict[key]=value pattern to put entry into a dictionary.
+Use ** operator to get power of a number.
+Use range() for loops.
+
+Solution
+def printDict():
+	d=dict()
+	for i in range(1,21):
+		d[i]=i**2
+	print d
+		
+
+printDict()
+
+
+#----------------------------------------#
+2.10
+
+Question:
+Define a function which can generate a dictionary where the keys are numbers between 1 and 20 (both included) and the values are square of keys. The function should just print the values only.
+
+Hints:
+
+Use dict[key]=value pattern to put entry into a dictionary.
+Use ** operator to get power of a number.
+Use range() for loops.
+Use keys() to iterate keys in the dictionary. Also we can use item() to get key/value pairs.
+
+Solution
+def printDict():
+	d=dict()
+	for i in range(1,21):
+		d[i]=i**2
+	for (k,v) in d.items():	
+		print v
+		
+
+printDict()
+
+#----------------------------------------#
+2.10
+
+Question:
+Define a function which can generate a dictionary where the keys are numbers between 1 and 20 (both included) and the values are square of keys. The function should just print the keys only.
+
+Hints:
+
+Use dict[key]=value pattern to put entry into a dictionary.
+Use ** operator to get power of a number.
+Use range() for loops.
+Use keys() to iterate keys in the dictionary. Also we can use item() to get key/value pairs.
+
+Solution
+def printDict():
+	d=dict()
+	for i in range(1,21):
+		d[i]=i**2
+	for k in d.keys():	
+		print k
+		
+
+printDict()
+
+
+#----------------------------------------#
+2.10
+
+Question:
+Define a function which can generate and print a list where the values are square of numbers between 1 and 20 (both included).
+
+Hints:
+
+Use ** operator to get power of a number.
+Use range() for loops.
+Use list.append() to add values into a list.
+
+Solution
+def printList():
+	li=list()
+	for i in range(1,21):
+		li.append(i**2)
+	print li
+		
+
+printList()
+
+#----------------------------------------#
+2.10
+
+Question:
+Define a function which can generate a list where the values are square of numbers between 1 and 20 (both included). Then the function needs to print the first 5 elements in the list.
+
+Hints:
+
+Use ** operator to get power of a number.
+Use range() for loops.
+Use list.append() to add values into a list.
+Use [n1:n2] to slice a list
+
+Solution
+def printList():
+	li=list()
+	for i in range(1,21):
+		li.append(i**2)
+	print li[:5]
+		
+
+printList()
+
+
+#----------------------------------------#
+2.10
+
+Question:
+Define a function which can generate a list where the values are square of numbers between 1 and 20 (both included). Then the function needs to print the last 5 elements in the list.
+
+Hints:
+
+Use ** operator to get power of a number.
+Use range() for loops.
+Use list.append() to add values into a list.
+Use [n1:n2] to slice a list
+
+Solution
+def printList():
+	li=list()
+	for i in range(1,21):
+		li.append(i**2)
+	print li[-5:]
+		
+
+printList()
+
+
+#----------------------------------------#
+2.10
+
+Question:
+Define a function which can generate a list where the values are square of numbers between 1 and 20 (both included). Then the function needs to print all values except the first 5 elements in the list.
+
+Hints:
+
+Use ** operator to get power of a number.
+Use range() for loops.
+Use list.append() to add values into a list.
+Use [n1:n2] to slice a list
+
+Solution
+def printList():
+	li=list()
+	for i in range(1,21):
+		li.append(i**2)
+	print li[5:]
+		
+
+printList()
+
+
+#----------------------------------------#
+2.10
+
+Question:
+Define a function which can generate and print a tuple where the value are square of numbers between 1 and 20 (both included). 
+
+Hints:
+
+Use ** operator to get power of a number.
+Use range() for loops.
+Use list.append() to add values into a list.
+Use tuple() to get a tuple from a list.
+
+Solution
+def printTuple():
+	li=list()
+	for i in range(1,21):
+		li.append(i**2)
+	print tuple(li)
+		
+printTuple()
+
+
+
+#----------------------------------------#
+2.10
+
+Question:
+With a given tuple (1,2,3,4,5,6,7,8,9,10), write a program to print the first half values in one line and the last half values in one line. 
+
+Hints:
+
+Use [n1:n2] notation to get a slice from a tuple.
+
+Solution
+tp=(1,2,3,4,5,6,7,8,9,10)
+tp1=tp[:5]
+tp2=tp[5:]
+print tp1
+print tp2
+
+
+#----------------------------------------#
+2.10
+
+Question:
+Write a program to generate and print another tuple whose values are even numbers in the given tuple (1,2,3,4,5,6,7,8,9,10). 
+
+Hints:
+
+Use "for" to iterate the tuple
+Use tuple() to generate a tuple from a list.
+
+Solution
+tp=(1,2,3,4,5,6,7,8,9,10)
+li=list()
+for i in tp:
+	if tp[i]%2==0:
+		li.append(tp[i])
+
+tp2=tuple(li)
+print tp2