Answer for ch 6 class 11 computer
Answers
Answer:
Question1. What is the difference between else and elif construct of if statement?
Answer:
Else
elif
Else is a part of if statement.
The elif is short for else if.
Else statement is executed whenever the if statement is getting false.
Elif executed block of code whenever one of the condition evaluate true.
Example:
If(a<b)
Print “a less than b”
Else
Print “ a is not less than b”
Example:
If num> 0;
Print “positive number”
Elifnum == 0;
Print “zero”
Else:
Print “negative number”
Question 2. What is the purpose of range() function? Give one example.
Answer:
Function range() is used for creating a list containing the integer values in sequence from start value to stop value. Sometimes it is used for generating the number sequentially in for loop.
Example:
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Question 3. Differentiate between break and continue statements using examples.
Answer:
Break Statement
Continue Statement
Break statement is to break the loop.
Continue statement is used to to continue the loopBreak statement is used with switch statement
Continue statement is not used with switch statements
Keyword: break
Keyword: continue
Question 4. What is an infinite loop? Give one example.
Answer:
Infinite loop execute when while condition never become falseIf condition remain true. the loop will never get terminated.The control enters in loop and keeps repeating the same block code and loop never end.
Example:
a = 1
while a==1:
b = input(“what’s your birthdate?”)
print(“your birthdate is ”, b)
Output:
What’s your birthdate?
13
your birthdate is 13
What’s your birthdate?
14
your birthdate is 14
What’s your birthdate?
15
your birthdate is 15
What’s your birthdate?
16
your birthdate is 16
:
:
:
Question 5. Find the output of the following program segments:
(i) a = 110
while a > 100:
print(a)
a -= 2
Output: 110
108
106
104
(ii) for i in range(20,30,2):
print(i)
Output: 20
22
24
26
28
(iii) country = ‘INDIA’
for i in country:
print (i)
Output:
I
N
D
I
A
(iv) i = 0; sum = 0
while i < 9:
if i % 4 == 0:
sum = sum + i
i = i + 2
print (sum)
Output: 12
v) for x in range(1,4):
for y in range(2,5):
if x * y > 10:
break
print (x * y)
Output:
2
3
4
4
6
8
6
9
(v) var = 7
whilevar> 0:
print (‘Current variable value: ‘, var)
var = var -1
if var == 3:
break
else:
if var == 6:
var = var -1
continue
print (“Good bye!”)
Output:
Current variable value: 7
Current variable value: 5
Good bye!
Current variable value: 4
Programming Exercises
Question 1. Write a program that takes the name and age of the user as input and displays a message whether the user is eligible to apply for a driving license or not. (the eligible age is 18 years).
Answer:
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Question 2. Write a function to print the table of a given number. The number has to be entered by the user.
Answer:
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Explanation:
hope it help you