- 1Python String capitalize() – Capitalize First Letter of a String
- 2Python String casefold() – Case-Insensitive String Comparison
- 3Python String center() Method – Center Align a String with Padding
- 4Python String count() Method – Count Substring Occurrences
- 5Python string.encode() – Convert String to Bytes
- 6Python String endswith() – Check if a String Ends with Substring
- 7Python String expandtabs() – Replace Tabs with Spaces
- 8Python String find() – How to Locate Substrings Easily
- 9Python String index() Method – Find Position of a Substring
- 10Python String isalnum() Method – Check Alphanumeric Strings
- 11Python String isalpha() Method – Check for Alphabetic Characters
- 12Python String isascii() Method – Check for ASCII Characters
- 13Python String isdecimal() Method – Check if All Characters Are Decimals
- 14Python String isdigit() Method – Check If a String Has Only Digits
- 15Python String isidentifier() – Check for Valid Identifiers
- 16Python String islower() Method – Check for Lowercase Strings
- 17Python String isnumeric() Method – Check for Numeric Characters
- 18Python String isprintable() Method – Check Printable Characters
- 19Python String isspace() Method – Check for Whitespace Only
- 20Python String istitle() Method – Check for Title Case
- 21Python String isupper() Method – Check for Uppercase Letters
- 22Python String join() Method – Combine Strings Easily
- 23Python String ljust() Method – Left Justify a String with Spaces or Characters
- 24Python String lower() Method – Convert to Lowercase
- 25Python String lstrip() Method – Remove Leading Characters
- 26Python String maketrans() Method – Create Translation Tables
- 27Python String partition() Method – Split into Three Parts
- 28Python String replace() Method – Replace Substrings Easily
- 29Python String rfind() Method – Find Last Occurrence of Substring
- 30Python String rindex() Method – Find Last Occurrence of a Substring
- 31Python String rjust() Method – Right Justify a String
- 32Python String rpartition() Method – Split String from the Right
- 33Python String rsplit() Method – Split from the Right
- 34Python String rstrip() Method – Remove Trailing Characters
- 35Python String split() Method – Split Strings Easily
- 36Python String splitlines() Method – Split String by Line Breaks
- 37Python String startswith() Method – Check If a String Starts With
- 38Python String strip() Method – Remove Spaces from Ends
- 39Python String swapcase() Method – Convert Uppercase to Lowercase and Vice Versa
- 40Python String title() Method – Convert to Title Case
- 41Python String translate() Method – Replace Characters Using Mapping
- 42Python String upper() Method – Convert to Uppercase
- 43Python String zfill() Method – Pad String with Zeros
Python String count() Method – Count Substring Occurrences
Next Topic ⮕Python string.encode() – Convert String to Bytes
Python String count()
Method
The count() method in Python is used to count how many times a substring appears in a given string. It is one of the most useful string methods for text analysis and data cleaning.
Syntax
string.count(substring, start, end)
Parameters:
substring
– The string you want to search for (required)start
– The position to start searching (optional)end
– The position to stop searching (optional)
Returns:
- An
integer
value representing the number of times the substring appears within the given range.
Example 1: Basic Usage
text = "apple banana apple orange apple"
print(text.count("apple"))
3
Example 2: With Start and End Parameters
text = "apple banana apple orange apple"
print(text.count("apple", 10, 30))
1
Use Cases
- Finding how often a word appears in a sentence
- Basic data analysis on text fields
- Validating inputs or detecting duplicates
Case Sensitivity
text = "Python python PyThOn"
print(text.count("python"))
1
Note: count()
is case-sensitive. To count in a case-insensitive way, convert the string using lower()
or upper()
first.
Common Mistakes
- Forgetting case sensitivity: "Apple" and "apple" are counted differently.
- Incorrect range: Ensure you use proper start and end index positions.
Interview Tip
count()
is often used in problems like finding duplicates, analyzing text patterns, or simple statistics questions.
Summary
count()
returns how many times a substring appears in the string.- You can specify optional
start
andend
positions. - It is case-sensitive by default.
Practice Problem
Write a program that reads a sentence from the user and prints how many times the word "the" appears (case-insensitive).
sentence = input("Enter a sentence: ")
word_count = sentence.lower().count("the")
print("Count of 'the':", word_count)