Online Learning Platform
Python String Practice Problems
In this program, we will take a string as input and get a string made of the first and last 2 chars
#Input string
string = "Sqatools"
#Printing output
print(string[:2]+string[-2:])
Output :
Sqls
In this program, we will take a string as input and get the first 4 characters of a string.
#Input string
string = "Sqatools"
#Printing output
print(string[:4])
Output :
Sqat
In this program, we will take a string as input and find words greater than the given length.
#Input string
string = "We are learning python"
for word in string.split(" "):
if len(word) > 3:
print(word,end=" ")
Output :
learning python
In this program, we will take a string as input and repeat vowels and consonants 3 and 2 times respectively.
#Input string
str1 = "Sqa Tools Learning"
result = ""
vowels = ["a","e","i","o","u",
"A","E","I","O","U"]
for char in str1:
if char in vowels:
result = result + char*3
else:
result = result + char*2
#Printing output
print(result)
Output :
SSqqaaa TToooooollss LLeeeaaarrnniiinngg
In this program, we will take a string as input and replace the second occurrence of any char with the special character $.
#Input string
str1 = "Programming"
result = ''
#checking for repeated char
for char in str1:
if char in result:
result = result + "$"
else:
result = result + char
#Printing output
print("Result :", result)
Output :
Result : Prog$am$in$
In this program, we will take a string as input and find the most simultaneously repeated character in the input string.
#Input string
str1 = "Helllllo ffdfdas sdfsfsd sssfdddd"
max_repeat_count = 0
max_repeat_char = ''
temp = 1
for i in range(len(str1)-1):
if str1[i] == str1[i+1]:
temp = temp + 1
if temp > max_repeat_count:
max_repeat_count = temp
max_repeat_char = str1[i]
else:
temp = 1
#Printing output
print("Max repeated char :", max_repeat_char,
"\nMax repeated count :", max_repeat_count)
Output :
Max repeated char : l
Max repeated count : 5
In this program, we will take a string as input and find the least frequent character in a string.
#Input string
string = "abcdabdggfhf"
char_freq = {}
for char in string:
if char in char_freq:
char_freq[char] = char_freq[char]+1
else:
char_freq[char] = 1
result = min(char_freq, key = char_freq.get)
#Printing output
print("Least frequent character: ",result)
Output :
Least frequent character: c
In this program, we will take a string as input and count occurrences of word in a string.
#Input string
string1 = "I want to eat fast food"
#Printing output
print("Occurences of food: ",
string1.count("food"))
#Input string
string2 = "We are learning Python, wow are you"
#Printing output
print("Occurences of we: ",
string2.count("are"))
Output :
Occurences of food: 1
Occurences of we: 2
In this program, we will take a string as input and find the location of a word in a string.
#Input string
string = "I am solving problems based on strings"
#Splitting the string
List = string.split(" ")
#Printing output
List.index("problems")
Output :
3
In this program, we will take a string as input and convert numeric words to numbers.
#Input string
string = "five four three two one"
new_str = ""
for val in string.split():
if val == "one":
new_str += "1"
elif val == "two":
new_str += "2"
elif val == "three":
new_str += "3"
elif val == "four":
new_str += "4"
elif val == "five":
new_str += "5"
elif val == "six":
new_str += "6"
elif val == "seven":
new_str += "7"
elif val == "eight":
new_str += "8"
elif val == "nine":
new_str += "9"
elif val == "ten":
new_str += "10"
#Printing output
print(new_str)
Output :
54321