Ruby Basic: Exercises, Practice, Solution
Ruby Basic Exercises [55 exercises with solution]
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1. Write Ruby program to get ruby version with patch number.
Sample Output:
Ruby Version: 2.4.2 Ruby Patch Level: 198
2. Write a Ruby program to display the current date and time.
Sample Output:
Current Date and Time: 27/12/2017 06:04
3. Write a Ruby program to create a new string which is n copies of a given string where n is a non-negative integer.
Sample Output:
a aa aaa aaaa aaaaa
4. Write a Ruby program which accept the radius of a circle from the user and compute the parameter and area.
Sample Output:
Input the radius of the circle: The perimeter is 31.41592653. The area is 78.539816325.
5. Write a Ruby program to check whether a string starts with "if"
Sample Output:
true false
6. Write a Ruby program which accept the user's first and last name and print them in reverse order with a space between them.
Sample Output:
Input your first name: Input your last name: Hello Lanoie Gary
7. Write a Ruby program to accept a filename from the user print the extension of that.
Sample Output:
File name: test.rb Base name: test Extention: .rb Path name: /user/system
8. Write a Ruby program which accept the user's first and last name and print them in reverse order with a space between them.
Sample Output:
false true
9. Write a Ruby program to check three numbers and return true if one or more of them are small. A number is called "small" if it is in the range 1..10 inclusive.
Sample Output:
true true false
10. Write a Ruby program to check three numbers and return true if one or the other is small, but not both. A number is called "small" if it is in the range 1..10 inclusive.
Sample Output:
true true false
11. Write a Ruby program to print the following 'here document'.
Sample string :
a string that you "don't" have to escape
This
is a ....... multi-line
heredoc string --------> example
Sample string : a string that you "don't" have to escape This is a ....... multi-line heredoc string --------> example
12. Write a Ruby program to create a new string where "if" is added to the front of a given string. If the string already begins with "if", return the string unchanged.
Sample Output:
if else if else
13. Write a Ruby program to create a new string from a given string using the first three characters or whatever is there if the string is less than length 3. Return n copies of the string.
Sample Output:
abc abcabc abc abcabc abc abab
14. Write a Ruby program which accept the radius of the sphere as input and compute the volume.
Sample Output:
Input the radius of the circle: The volume of the sphere is : 392.699081625.
15. Write a Ruby program to create a new string from a given string where the first and last characters have been exchanged.
Sample Output:
nythoP aavJ
16. Write a Ruby program to test whether you are minor (Consider a child unless he or she is less than 18 years old.) or not.
Sample Output:
Input your age: You are a minor
17. Write a Ruby program to compute the absolute difference between n and 33 and return double the absolute difference if n is over 33.
Sample Output:
28 16
18. Write a Ruby program to find the maximum of two numbers.
Sample Output:
Max = 8
19. Write a Ruby program to check two integers and return true if one of them is 20 otherwise return their sum.
Sample Output:
true false true
20. Write a Ruby program to find the greatest of three numbers.
Sample Output:
y = 5 is greatest.
21. Write a Ruby program to check whether a number is within 10 of 100 or 200.
Sample Output:
false true true
22. Write a Ruby program to compute the sum of the two integers, if the two values are equal return double their sum otherwise return their sum.
Sample Output:
20 9
23. Write a Ruby program to print "Ruby Exercises" 9 times.
Sample Output:
Ruby exercises Ruby exercises Ruby exercises Ruby exercises Ruby exercises Ruby exercises Ruby exercises Ruby exercises Ruby exercises
24. Write a Ruby program to create a new string from a given string with the last character added at the front and back of the given string. The length of the given string must be 1 or more.
Sample Output:
cabcc dabcdd ajavaa
25. Write a Ruby program to check two temperatures and return true if one is less than 0 and the other is greater than 100.
Sample Output:
true true false
26. Write a Ruby program to print 34 upto 41.
Sample Output:
34 35 36 37 38 39 40 41 42
27. Write a Ruby program to print even numbers from 1 to 10.
Sample Output:
Even numbers between 2 to 10: 2 4 6 8 10
28. Write a Ruby program to print odd numbers from 10 to 1.
Sample Output:
Odd numbers between 9 to 1: 9 7 5 3 1
29. Write a Ruby program to print the elements of a given array.
Sample array : ["Ruby", 2.3, Time.now]
Sample Output:
true true false
30. Write a Ruby program to check two non-negative integer values and return true if they have the same last digit.
Sample Output:
true true true false
31. Write a Ruby program to retrieve the total marks where subject name and marks of a student stored in a hash.
Sample subject and marks : Literature -74, Science – 89, Math-91
Sample Output:
Total Marks: 254
32. Write a Ruby program to print a specified character twenty times.
Sample Output:
******************** #################### @@@@@@@@@@@@@@@@@@@@
33. Write a Ruby program to test whether a year is leap year or not.
Sample Output:
2012 is leap year 1500 is not leap year 1600 is leap year 2020 is leap year
34. Write a Ruby program to check whether a string 'Java' appears at index 1 in a given sting, if 'Java' appears return the string without 'Java' otherwise return the string unchanged.
Sample Output:
Script Oldjava
35. Write a Ruby program to create a string using the first two characters (if present) of a given string if the first character is 'p' and second one is 's' otherwise return a blank string.
Sample Output:
ps
36 Write a Ruby program to check two integers and return whichever value is nearest to the value 10, or return 0 if two integers are equal.
Sample Output:
7 9 0
37. Write a Ruby program to check two integer values and return true if they are both in the range 10..20 inclusive, or they are both in the range 20..30 inclusive.
Sample Output:
true false true false
38. Write a Ruby program to check two positive integer values and return the larger value that is in the range 20..30 inclusive, or return 0 if no number is in that range.
Sample Output:
0 29 30 0
39. Write a Ruby program to check a given string contains 'i' characters.
Sample Output:
false true true true
40. Write a Ruby program to check two non-negative integer values and return true if they have the same last digit.
Sample Output:
acegj aceg ace ac a
41. Write a Ruby program to count the number of 5's in a given array.
Sample Output:
0 1 2
42. Write a Ruby program to check whether one of the first 5 elements in a given array of integers is a 7. The array length may be less than 5.
Sample Output:
0 1 1
43. Write a Ruby program to check whether the sequence of numbers 10, 20, 30 appears anywhere in a given array of integers.
Sample Output:
true true false
44. Write a Ruby program to check two non-negative integer values and return true if they have the same last digit.
Sample Output:
16 20 37
45. Write a Ruby program to check two given integers and return true if either one is 11 or their sum or difference is 11 otherwise return false.
Sample Output:
true false true true false
46. Write a Ruby program to check a given non-negative number and return true if number is within 2 of a multiple of 10.
Sample Output:
true false true true true
47. Write a Ruby program to check two non-negative integer values and return true if they have the same last digit.
Sample Output:
true true true false
48. Write a Ruby program to check two non-negative integer values and return true if they have the same last digit.
Sample Output:
true true false
49. Write a Ruby program to check three given integers and return true if one of them is 20 or more less than one of the others.
Sample Output:
false true true
50. Write a Ruby program to check two given integers and return the larger value. However if the two values have the same remainder when divided by 5 then return the smaller value and if the two values are the same, return 0.
Sample Output:
12 110 0
51. Write a Ruby program to check two given integers, each in the range 10..99, return true if there is a digit that appears in both numbers.
Sample Output:
false true true
52. Write a Ruby program to check three given integers and return their sum. However, If one of the values is the same as another of the values, it does not count towards the sum.
Sample Output:
0 7 7 7 6
53. Write a Ruby program to check three given integers and compute their sum. However, if one of the values is 17 then it does not count towards the sum and values to its right do not count.
Sample Output:
15 10
54. Write a Ruby program to check three given integers x, y, z and return true if one of y or z is close (differing from a by at most 1), while the other is far, differing from both other values by 3 or more.
Sample Output:
true false false
55. Write a Ruby program to check two given integers and return the larger value. However if the two values have the same remainder when divided by 5 then return the smaller value and if the two values are the same, return 0.
Sample Output:
12 110 0
Ruby Code Editor:
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