Does Python have a string 'contains' substring method?

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Yes, Python provides a method to check if a string contains a substring. You can use the in keyword or the str.find() method to achieve this. Here's how:

  1. Using the in keyword: The in keyword can be used to check if a substring is present in a string. It returns a Boolean value (True or False).

    python
  • main_string = "Hello, World!"
substring = "World"

if substring in main_string:
    print("Substring found")
else:
    print("Substring not found")

  • Using the str.find() method: The str.find() method returns the index of the first occurrence of the substring, or -1 if the substring is not found.

    python
    1. main_string = "Hello, World!"
substring = "World"

index = main_string.find(substring)
if index != -1:
    print(f"Substring found at index {index}")
else:
    print("Substring not found")

    Both methods are effective for checking whether a substring exists within a string. Use the method that best fits your code's context and desired behavior.

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