- Python Basic Programs
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- 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
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- 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
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- 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
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- Python List Programs
- Python Count Even/Odd in List
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- Python Even Numbers in List
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- Python Sum of Elements in List
- Sum of Odd/Even Numbers
- Python Element at Even Position
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- 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
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- 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
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- Python Decimal to Hexadecimal
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- Python Octal to Decimal
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- Python Hexadecimal to Decimal
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- Python Matrix Programs
- Python Add Two Matrices
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- 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
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- Python Copy Files
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- Python Counts Characters in File
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- 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
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- Python Tutorial
- Python Tutorial
Python Program to Find Length of String
In this article, I've created some programs in Python, that find and prints length of string entered by user. Here are the list of approaches used:
- Find length of string using for loop
- Using while loop
- Using len() method
- Using user-defined function
Find Length of String using for Loop
To find length of any string in Python, you have to ask from user to enter any string and then find its length in character-by-character manner, using for loop, like shown in the program given below:
print("Enter the String: ") text = input() tot = 0 for ch in text: tot = tot+1 print("\nLength =", tot)
Here is its sample run:
Now supply the input say fresherearth as string and press ENTER
key to find and print length of
given string using for loop:
When user enters a string say fresherearth, then it gets stored in a variable named text. Now using for loop, the dry run of above program goes like:
- Initial value, tot=0
- Now the first character of text (that is, 'c') gets copied to ch variable, and program flow goes inside the loop, and the value of tot gets incremented by 1
- That is, tot+1 or 0+1 or 1 gets initialized to tot. So tot=1
- Now the second character of text (that is, 'o') gets copied to ch, and again program flow goes inside the loop and the value of tot again gets incremented by 1
- This process continues, until each and every character of text gets scanned
- In this way, after exiting from the loop, the variable tot holds the total number of characters available in the given string. That equals the length of string
- So print the value of tot on output, as length of string
Find Length of String using while Loop
The question is, write a Python program to find length of a given string using while loop. Here is its answer:
print("Enter a String: ", end="") text = input() tot = 0 while text[tot:]: tot = tot+1 print("\nLength =", tot)
Here is its sample run with string input welcome to jobails.com:
While slicing the string, the [tot:] refers to all characters from index number tot to last. For example if text = "fresherearth" is a given string. Therefore at 0th index of text (text[0]), 'c' is available, at 1st index of text (text[1]), 'o' is available, and so on. So if tot=2, then text[2:] returns "descracker" (all characters from second index).
Find Length of String using len()
This program is created using a predefined function named len(), that returns length of an object passed as its argument.
print("Enter a String: ", end="") text = input() textlen = len(text) print("\nLength =", textlen)
Find Length of String using Function
This is the final program on finding length of a given string in Python, created using a user-defined function named FindLenOfStr(). It returns the length of a value passed as its argument.
def FindLenOfStr(x): return len(x) print("Enter a String: ", end="") text = input() print("\nLength =", FindLenOfStr(text))
Same Program in Other Languages
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