- 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 Copy String
This article is created to cover some programs in Python, to copy one string to another. Here are the list of approaches used to do the task of copying string entered by user at run-time:
- Copy One String to Another in character by character manner
- Copy String using for loop and indexing
- Using = operator
- Using string slicing
Copy String Character by Character
To copy one string to another in Python, you have to ask from user to enter a string, then copy that string to another as shown in the program given below. The question is, write a Python program to copy string in character by character manner. Here is its answer:
print("Enter the String: ") textOne = input() textTwo = "" for x in textOne: textTwo = textTwo + x print("\nOriginal String =", textOne) print("\nCopied String =", textTwo)
Here is its sample run:
Now supply the input say fresherearth as string, and then press ENTER
key to copy the given
string into another string, and print the value of both (original and copied) strings as shown in the snapshot given below:
In above program, the following block of code:
for x in textOne: textTwo = textTwo + x
states that, each time the character gets copied to x and added with textTwo, then initialized the addition result as new value of textTwo. For example, if user enters fresherearth as string, then dry run goes like:
- At first execution of for loop, "c" (first character of textOne) gets initialized to x
- Since x's value (that is "c") is available in textOne. Therefore condition evaluates to be true and program flow goes inside the loop
- Inside the loop, textTwo + x or "" + "c" or "c" gets initialized to textTwo. So textTwo="c"
- Now "o" (second character of textOne) gets initialized to x
- Since x's value (that is "o") is also available in textOne. Therefore condition evaluates to be true again and program flow goes inside the loop
- And inside the loop, textTwo + x or "c" + "o" or "co" gets initialized to textTwo. So textTwo="co"
- This process continues upto the last character of textOne
- In this way, the first string (entered by user) gets copied to second
Copy String using for Loop and Indexing
This program does the same job as of previous one. But it is created with different approach. This program uses index of entered string to copy its value to another string. Let's have a look at the program first:
print("Enter the String: ", end="") sOne = input() sTwo = "" for i in range(len(sOne)): sTwo = sTwo + sOne[i] print("\nOriginal String =", sOne) print("\nCopied String =", sTwo)
Here is its sample run with user input, Welcome to jobails.com:
Note - The end= is used to skip inserting an automatic newline using print().
Note - The len() method returns length of string passed as its argument.
Indexing starts with 0. For example, if user enters a string say codes and this string gets initialized to a variable say sOne. That is, sOne = "codes". Then sOne[0] refers to "c" (first character of "codes"), sOne[1] refers to "o" (second character of "codes"), and so on
Therefore in similar way like done in previous program, this program also copies the string in character by character manner. The dry run of following block of code:
for i in range(len(sOne)): sTwo = sTwo + sOne[i]
with same user input, as provided in above sample run, that is Welcome to jobails.com goes like:
- Since range() method returns a sequence of values. By default, starts with 0 and increments by 1 every time. Continues until one less than the value passed as its argument.
- Therefore initially i=0 and since 0 is less than len(sOne) or len("Welcome to jobails.com") or 27, therefore condition evaluates to be true and program flow goes inside the loop
- Inside the loop, sTwo + sOne[i] or "" + sOne[0] or "" + "W" or "W" gets initialized to sTwo
- Similarly, at second evaluation with i's value as 1, sTwo + sOne[i] or sTwo + sOne[1] or "W" + "e" or "We" gets initialized to sTwo
- In this way, I've copied one string to another
Copy String using = Operator
This is the simplest program to copy one string to another just by using = or initialization operator. Previous two programs are provided for practicing purpose to improve coding skills in Python.
print("Enter String: ", end="") sOne = input() sTwo = sOne print("\nCopied String =", sTwo)
Here is its sample run with string input Hello Python:
Copy String using String Slicing
This program does the same job, using string slicing. That is, I've sliced all the characters of entered string by user to another string.
print("Enter String: ", end="") sOne = input() sTwo = sOne[:] print("\nCopied String =", sTwo)
Note - While slicing sub-string from a string using [:], empty before : (colon) treated as 0, whereas empty after : (colon) treated as length value of string. Therefore from 0th to last index, all characters gets sliced and copied to sTwo variable.
Same Program in Other Languages
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