Question

1. Write a program(Python language for the following three questions), with comments, to do the following:   
   1. Ask the user to enter an alphabetic string and assign the input to a variable str1. Print str1.
   2. Check if str1 is valid, i.e. consists of only alphabetic characters. If str1 is valid
      1. Print “<str1> is a valid string.”
      2. If the first character of str1 is uppercase, print the entire string in uppercase, with a suitable message.
      3. If the first character of str1 is lowercase, print the entire string in lowercase, with a suitable message.

         otherwise (i.e. str1 is not an alphabetic string) print a message saying that the user entered an invalid input.

1. 3. Print str1 centered in a field of 25 characters, with ‘#’ used as padding. Part c should be done, whether str1 is a valid string or not.
2. Write a program, with comments, to do the following:   
   1. Ask the user to enter an alphabetic string str1 with only uppercase letters. You may assume the user will enter valid string. Print str1.
      1. If the first 2 characters of str1 are in the range A – HM, print “<str1> belongs to group 1.”
      2. If the first 2 characters of str1 are in the range HN – KI, print “<str1> belongs to group 2.”
      3. If the first 2 characters of str1 are in the range KJ – TZ, print “<str1> belongs to group 3.”.
      4. Otherwise, print “<str1> belongs to group 4.”.

   3.Write a program, with comments, to do the following:

1. Define a list L1 consisting of at least 5 strings (e.g. L1 = [‘apple’, ‘ball’, ‘camera’, ‘dog’, ‘elephant’, ‘flower’, ‘go’]) and print L1.
2. Ask the user to enter an integer n between 0 and max-1, where max is the number of elements in the list. Assume user will enter an integer, but it may not be in the proper range.
3. Check if n is in the proper range. If n is in proper range:
   1. Assign n^th element of L1 (e. element with index n) to variable x. Print x with a suitable message.
   2. Check if last character of x is a vowel.
      1. If it is a vowel, print x in uppercase.
      2. Otherwise, print the number of characters in x with a suitable message.

Answer 1

1)ans..

str1 = input("Enter string : ") #Read input
str2=str1 #assign it to str2
if(str1.isalpha()): #check if it contains only aplphabets or not
print(str1," is valid")
if(str1[0].isupper()): #echck if first is capital or not
print(str1.upper())
elif(str1[0].islower()): #check if second char is lower case or not
print(str1.lower())
else:
print("you entered a invalid input")
else:
print("you entered a invalid input")

print(str1.center(25,'#'))

OUTPUT:

Q2)ANS

CODE:

str1 = input("Enter string in UPPERCASE : ")
if((str1[0]>='A' and str1[0]<='H')and (str1[1]>='A' and str1[1]<='M')):
print("belongs to group 1")
elif((str1[0]>='H' and str1[0]<='K')and (str1[1]>='I' and str1[1]<='N')):
print("belongs to group 2")
elif((str1[0]>='K' and str1[0]<='T')and (str1[1]>='J' and str1[1]<='Z')):
print("belongs to group 3")
else:
print("belongs to group 4")

OUTPUT:

Q3)ANS

CODE:

L1 = ['apple','ball','camera','dog','elephant','flower','go']
vowel="aeiou"
n = int(input("Enter n value : "))
if(n>=0 and n<=len(L1)-1):
x=L1[n]
print("Elements at",n," is",x)
if(x[len(x)-1] in vowel):
print(x.upper())
else:
print("Number of characters in",x ," is",len(x))
else:
print("out of range ")

OUTPUT::

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