Class 11 CS Chapter 8 Conditional And Iterative Statement Solutions Sumita Arora New Syllabus

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Ex 8.1

Ex 8.2

Ex 8.3

16. Can a single break statement in an inner loop terminate all the nested loops ?
15. What is the significance of break and continue statements?
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14. What is the output produced by following loop ?
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13. What will be the output of following code:
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12. If the test-expression of a while loop evaluates to false in the beginning of the loop, even before entering in to the loop : (a) how many times is the loop executed? (b) how many times is the loop-else clause executed ?
a) Loop ...
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11. Why is while loop called an entry controlled loop ?
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10. What is the similarity and difference between for and while loop ?
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8. Write a for loop that displays the even numbers from 51 to 60.
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9. Suggest a situation where an empty loop is useful.
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7. What is the output of following code ?
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6. Why does “Hello” not print even once ?
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5. What is the output of the following code fragment ?
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3. What is the use of range() function ? What would range(3, 13) return ?
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4. What is the output of the following code fragment ?
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2. What are the two categories of Python for a in range(3) : for b in range(5,7) : Loops ?
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1. What are iteration statements ? Name the iteration statements provided by Python.
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Back Exercise Part A

17. What are jump statements ? Name them.
16. In which cases, the else clause of a loop does not get executed.
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15. What is the difference between else clause of if-else and else clause of python loops ?
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14. What are the four elements of a while loop in python ?
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13. What is entry-controlled loop ?
A loop ...
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12. Write pseudocode for comparing two products of two sets of numbers (a, b and c, d) and displaying if both products are same or not.
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11. Draw decision tree for grade calculation as per :
Decision Tree ...
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10. Draw flowchart for displaying first 10 odd numbers.
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9. Write pseudocode for checking if a number is a factor of 3215 ?
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8. What is decision tree ? Where are these useful ?
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7. What is pseudocode ? How is it useful in developing logic for the solution of a problem ?
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6. What is a flowchart ? How is it useful ?
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19. What are endless loops ? Why do such loops occur ?
Endless loops ...
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5. What is an algorithm ?
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18. How and when are named conditions useful ?
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4. Which Python statement can be termed as empty statement ?
The 'pass' ...
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3. What is empty statement ? What is its need ?
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1. What is the common structure of Python compound statements ?
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2. What is the importance of the three programming constructs ?
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8. When do you think text files should be preferred over binary files ?
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Back Exercise Part B

11. Draw decision tree for grade calculation as per :
Decision Tree ...
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6. What is a flowchart ? How is it useful ?
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8. How are following two code fragments different from one another ? Also, predict the output of the following code fragments :
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9. Rewrite the following code fragments using for loop :
(b) ...
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10. Rewrite following code fragments using while loops :
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11. Predict the output of the following code fragments :
# Output ...
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12. What is the output of the following code ?
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13. In the nested for loop code above (Q. 12), how many times is the condition of the if clause evaluated?
20 times ...
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14. Which of the following Python programs implement the control flow graph shown ?
Ans : ...
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4. Which Python statement can be termed as empty statement ?
The 'pass' ...
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7. What is following code doing ? What would it print for input as 3 ?
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5. What is the output of the following lines of code ?
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6. Find the errors in the code given below and correct the code :
Errors are ...
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3. What is the output produced by the following code ?
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1. Rewrite the following code fragment that saves on the number of comparisons:
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4. What is the error in following code ? Correct the code :
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2. Under what conditions will this code fragment print “water” ?
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Back Exercise Part C

1. Write a Python script that asks the user to enter a length in centimetres. If the user enters a negative length, the program should tell the user that the entry is invalid. Otherwise, the program should convert the length to inches and print out the result. There are 2.54 centimetres in an inch.
2. A store charges ? 120 per item if you bu^ less than 10 items. If you buy between 10 and 99 items, the cost is ? 100 per item. If you buy 100 or more items, the cost is ^ 70 per item. Write a program that asks the user how many items they are buying and prints the total cost.
# Code ...
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3. Write a program that asks the user for two numbers and prints Close if the numbers are within .001 of each other and Not close otherwise.
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4. A year is a leap year if it is divisible by 4, except that years divisible by 100 are not leap years unless they are also divisible by 400. Write a program that asks the user for a year and prints out whether it is i leap year or not.
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5. Write a program to input length of three sides of a triangle. Then check if these sides will form a triangle or not. (Rule is : a + b >,c ; b + c > a ; c + a > b )
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6. Write a short program to input a digit and print it in words.
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7. Write a short program to print first n odd numbers in descending order.
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8. Write a short program to print the following series :
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9. Write a short program to find average of list of numbers entered through keyboard.
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10. Write a program to take an integer a as an input and check whether it ends with 4 or 8. If it ends with 4 print “ends with 4”, if it ends with 8, print “ends with 8”, otherwise print “ends with neither”.
a = ...
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11. Write a program to take N (N > 20) as an input from the user. Print numbers from 11 to N. When the number is a multiple of 3, print “Tipsy”, when it is a multiple of 7, print “Topsy”. When it is a multiple of both, print “TipsyTopsy”.
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12. Write a short program to find largest number of a list of numbers entered through keyboard.
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13. Write a program to input N numbers and then print the second largest number.
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14. Given a list of integers, write a program to find those which are palindromes. For example, the number 4321234 is a palindrome as it reads the same from left to right and from right to left.
l = ...
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15. Write a Python program to print every integer between 1 and n divisible by m. Also report whether the number that is divisible by m is even or odd.
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16. Write a program to accept the age of n employees and count the number of persons in the following age- group : (i) 26 – 35 (ii) 36 – 45 (iii) 46 – 55.
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17. Write a program using nested loops to produce a rectangle of *’s with 6 rows and 20 *’s per row.
# Output ...
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18. Given three numbers A, B and C, write a program to write their values in an ascending order. For example, if A = 1,2, B = 10, and C =15, your program should print out : Smallest number = 10 Next higher number = 12 Highest number = 15
a, b, ...
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19. Ask the user to enter a temperature in Celsius. The program should print a message based on the temperature :
# Code ...
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20. Write a program to calculate correlation coefficient after collecting data about 10 of your classmates are in the form of
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21. Write a program to calculate standard deviation for a batsman’s score in last 10 matches.
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