- Python Basic Programs
- Python Program Examples
- Python Print Hello World
- Python Get Input from User
- Python Add Two Numbers
- Add Subtract Multiply Divide
- Python Check Even or Odd
- Python Check Prime or Not
- Python Check Alphabet or Not
- Python Check Vowel or Not
- Python Check Leap Year or Not
- Check Reverse equal Original
- Check Positive Negative Zero
- Python Check Armstrong or Not
- Python Check Palindrome or Not
- Python Check Perfect Number
- Python Find Reverse of Number
- Python Count Digits in Number
- Python Add Digits of Number
- Sum of First and Last Digits
- Python Product of Mid Digits
- Sum of Squares of Digits
- Interchange Digits of Number
- Python Sum of n Numbers
- Python Print ASCII Values
- Python Swap Two Numbers
- Python Swap Two Variables
- Python Fahrenheit to Celsius
- Python Celsius to Fahrenheit
- Python Display Calendar
- Python Days into Years, Weeks
- Find Largest of Two Number
- Find Largest of Three Number
- Python Print Fibonacci Series
- Generate Armstrong Numbers
- Python Make Simple Calculator
- Python Add Binary Numbers
- Binary Number Multiplication
- Python Mathematical Programs
- Find Sum of Natural Numbers
- Find Average of n Numbers
- Python Print Multiplication Table
- Print Table using Recursion
- Python Find Average Percentage
- Python Find Grade of Student
- Find Square Root of Number
- Python Print Prime Numbers
- Find Numbers Divisible by
- Python Find Factors of Number
- Python Find Factorial of a Number
- Python Find HCF & LCM
- Python Kilometres to Miles
- Python Find Area of Square
- Python Find Area of Rectangle
- Python Find Area of Triangle
- Python Find Area of Circle
- Python Find Perimeter of Square
- Find Perimeter of Rectangle
- Python Find Perimeter of Triangle
- Find Circumference of Circle
- Python Simple Interest
- Python Solve Quadratic Equation
- Python Different Set of Operations
- Python Display Powers of 2
- Python Find nCr & nPr
- Python Pattern Programs
- Python Print Pattern Programs
- Python Print Diamond Pattern
- Python Print Floyd's Triangle
- Python Print Pascal's Triangle
- Python List Programs
- Python Count Even/Odd in List
- Python Positive/Negative in List
- Python Even Numbers in List
- Python Odd Numbers in List
- Python Sum of Elements in List
- Sum of Odd/Even Numbers
- Python Element at Even Position
- Python Element at Odd Position
- Python Search Element in List
- Python Largest Number in List
- Python Smallest Number in List
- Python Second Largest in List
- Python Second Smallest in List
- Python Insert Element in List
- Python Delete Element from List
- Python Multiply Numbers in List
- Swap Two Elements in List
- Python 1D Array Program
- Python Linear Search
- Python Binary Search
- Python Insertion Sort
- Python Bubble Sort
- Python Selection Sort
- Remove Duplicates from List
- Python Reverse a List
- Python Merge Two List
- Python Copy a List
- Python Conversion Programs
- Python Decimal to Binary
- Python Decimal to Octal
- Python Decimal to Hexadecimal
- Python Binary to Decimal
- Python Binary to Octal
- Python Binary to Hexadecimal
- Python Octal to Decimal
- Python Octal to Binary
- Python Octal to Hexadecimal
- Python Hexadecimal to Decimal
- Python Hexadecimal to Binary
- Python Hexadecimal to Octal
- Python Matrix Programs
- Python Add Two Matrices
- Python Subtract Two Matrices
- Python Transpose Matrix
- Python Multiply Matrices
- Python String Programs
- Python Print String
- Python Find Length of String
- Python Compare Two Strings
- Python Copy String
- Python Concatenate String
- Python Reverse a String
- Python Swap Two Strings
- Python Uppercase to Lowercase
- Python Lowercase to Uppercase
- Python Check Substring in String
- Python Count Character in String
- Count Repeated Characters
- Python Count Word in Sentence
- Python Count Each Vowels
- Python Capitalize Character
- Python Capitalize Word in String
- Python Smallest/Largest Word
- Remove Spaces from String
- Remove Duplicate Character
- Remove Vowels from String
- Remove Punctuation from String
- Python Remove Word in String
- Python Remove Duplicate Words
- WhiteSpace to Hyphens
- Replace Vowels with Character
- Replace Character in String
- Python Sort String in Alphabetical
- Sort Word in Alphabetical Order
- Extract Number from String
- Python Check Anagram Strings
- Python File Programs
- Python Read a File
- Python Write to File
- Python Append Text to File
- Python Copy Files
- Python Merge Two Files
- Python Counts Characters in File
- Python Count Words in File
- Python File Content in Reverse
- Python Lines Contains String
- Python Delete Line from File
- Python Capitalize Word in File
- Python Replace Text in File
- Replace Specific Line in File
- Python Find Size of File
- Python List Files in Directory
- Python Delete Files
- Python Misc Programs
- Python Reverse a Tuple
- Python Merge Two Dictionary
- Python bytes to String
- Python bytearray to String
- Generate Random Numbers
- Python Print Address of Variable
- Python Print Date and Time
- Python Get IP Address
- Python Shutdown/Restart PC
- Python Tutorial
- Python Tutorial
Python program to check if a substring is present in a given string
This article is created to cover a program in Python that checks whether a specified substring (a character or a phrase) is present in a given string or not. This article contains two programs:
- Check if a substring is available in a given string.
- Check if a substring is not available in a given string.
Python to check if a substring is in a string
The question is: write a Python program to check if a substring is available in a string. The value of both strings and substrings must be received by the user at runtime of the program. The answer to this question is the program given below:
print("Enter the String: ", end="") MyStr = input() print("\nEnter the Substring: ", end="") MySubStr = input() if MySubStr in MyStr: print("\nYes,\nThe substring is available in the string.") else: print("\nNo,\nThe substring is not available in the string.")
The snapshot given below shows a sample run of this program with user input, "Python is easy to learn" as a string and "easy" as a substring:
Note: The in operator is used to check the availability of a specified value in a specified sequence.
But the problem with the above program is that sometimes the user needs to check whether a substring is in the given string or not, with or without caring about the uppercase or lowercase characters. Therefore, we need to create a program that gives users options on how to proceed using both. For example:
print("Enter the String: ", end="") MyStr = input() print("Enter the Substring: ", end="") MySubStr = input() print("\n1. Uppercase/Lowercase matters") print("2. Uppercase/Lowercase doesn't matters") print("Enter Your Choice (1 or 2): ", end="") choice = int(input()) if choice == 1: if MySubStr in MyStr: print("\nYes,\nThe substring is available in the string.") else: print("\nNo,\nThe substring is not available in the string.") elif choice == 2: if MySubStr.lower() in MyStr.lower(): print("\nYes,\nThe substring is available in the string.") else: print("\nNo,\nThe substring is not available in the string.") else: print("\nInvalid Choice!")
The sample run with user input "Python is fun" as a string, "Fun" as a substring, and "2" as a choice to check the availability of a given phrase in a given string without caring about uppercase or lowercase letters is shown in the snapshot given below:
And the following snapshot shows another sample run, with the first two inputs being the same as the above sample run and the choice being "1":
Python to check if a substring is not in a string
This is the reverse of the above program. That is, this program checks whether a specified substring is not in a string or in the string. To do this task, use not before "in", that is, "not in", instead of "in". For example:
print("Enter the String: ", end="") x = input() print("Enter the Substring: ", end="") y = input() if y not in x: print("\n'", y, "' is not available in '", x, "'", sep="") else: print("\n'", y, "' is available in '", x, "'", sep="")
Here is its sample run with user input "codescracker.com" as a string and "org" as a phrase to confirm whether it is not available in the given string or whether it is in the given string:
The second program from the previous section can also be created in a similar way in this section too. The only difference is that we need to replace "in" with "not in". That's it. Come on, do it yourself.
« Previous Program Next Program »