- 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 Concatenate Two Strings
In this article, we've created some programs in Python, to concatenate string entered by user at run-time. Here are the list of programs:
- Concatenate String using + Operator
- Using list
- Using join()
For example, if two given strings are codes and cracker. Then after concatenating second string into first. The first string codes becomes fresherearth after concatenation.
Concatenate Two Strings using +
To concatenate two strings in Python, you have to ask from user to enter the first and second string, then concatenate using + operator just like addition as shown in the program given below. The question is, write a Python program to concatenate one string to other. Here is its answer:
print("Enter the First String: ") strOne = input() print("Enter the Second String: ") strTwo = input() strThree = strOne + strTwo print("\nConcatenated String: ", strThree)
Here is the initial output produced by this Python program:
Now supply inputs say codes as first and cracker as second string, press ENTER
key to
concatenate given two strings into the third string and print the value of third string as shown in the snapshot given below:
Modified Version of Previous Program
This program concatenates second string entered by user into the first. The end= is used to skip printing of an automatic newline line through print()
print("Enter Two Strings: ", end="") strOne = input() strTwo = input() print("\nFirst String before Concatenation: ", strOne) strOne = strOne + strTwo print("\nFirst String after Concatenation: ", strOne)
Here is its sample run with same user input as of previous program's sample run:
Concatenate String using List
This is the program created through complete user-based code to concatenate two strings. That is, this program uses list to do the job. Let's have a look at the program first:
print("Enter Two Strings: ", end="") strOne = input() strTwo = input() print("\nFirst String before Concatenation:", strOne) oneList = [] twoList = [] oneList[:0] = strOne twoList[:0] = strTwo oneLen = len(strOne) twoLen = len(strTwo) for i in range(twoLen): oneList.insert(oneLen, twoList[i]) oneLen = oneLen+1 print("\nFirst String after Concatenation: ", end="") for i in range(len(oneList)): print(end=oneList[i]) print()
Here is it sample run with user input codes and cracker as first and second string:
The dry run of above program with same user input as given in above sample run, goes like:
- Initial values, strOne=codes and strTwo=cracker, entered by user
- Now using the statement
oneList = []
an empty list named oneList is defined - And using
oneList[:0] = strOne
the value of string stored in strOne, that is the first string (codes) gets stored in the list oneList from 0th index in following way:- oneList[0] = c
- oneList[1] = o
- oneList[2] = d
- oneList[3] = e
- oneList[4] = s
- The statement,
oneLen = len(strOne)
is used to find and store the length of strOne to oneLen. So after executing this statement, oneLen = 5. The length of codes - The range() method returns a sequence of values. It starts with 0 by default, and increments with 1. Stops before the number specified as its argument
- The statement,
oneList.insert(oneLen, twoList[i])
is used to insert a character at twoList[i] to the list oneList at its oneLenth index - That is, at first execution, twoList[i] or twoList[0] or c (very first c of cracker, the second string) gets stored in oneList[oneLen] or oneList[5]
- In this way, one by one, all characters of second string gets stored in first string's list
Concatenate Both String one by one
This program, concatenates first string to second, and second string to first using list.
print("Enter Two Strings: ", end="") strOne = input() strTwo = input() oneList = [] twoList = [] tmpList = [] oneList[:0] = strOne twoList[:0] = strTwo tmpList[:0] = strOne oneLen = len(strOne) twoLen = len(strTwo) tmpLen = oneLen for i in range(twoLen): oneList.insert(oneLen, twoList[i]) oneLen = oneLen+1 print("\nFirst String after Concatenating Second: ", end="") for i in range(len(oneList)): print(end=oneList[i]) for i in range(tmpLen): twoList.insert(twoLen, tmpList[i]) twoLen = twoLen+1 print("\nSecond String after Concatenating First: ", end="") for i in range(len(twoList)): print(end=twoList[i]) print()
Here is its sample run with same user input as of previous program's sample run:
Note - We've used third list named tmpList to do the job. That is, this list is used to store the first string's value.
Concatenate Two Strings using join()
This program uses join() function to join any string to another. Therefore string gets concatenated using join() method as shown in the program given below:
print("Enter Two Strings: ", end="") strOne = input() strTwo = input() print("\nBefore Concatenation: ", strOne) strOne = "".join([strOne, strTwo]) print("\nAfter Concatenation: ", strOne)
Here is its sample run with user input codes and cracker as first and second string:
To concatenate strings with a single space between them, replace the following statement:
strOne = "".join([strOne, strTwo])
with the statement given below:
strOne = " ".join([strOne, strTwo])
The sample run is shown in the snapshot given below after modifying this code/statement:
Same Program in Other Languages
« Previous Program Next Program »