s="Geeks welcome to the Geek Kingdom!"if"Geek"ins:print("Substring found!")else:print("Substring not found!")if"For"ins:print("Substring found!")else:print("Substring not found!")

Substring found!Substring not found!

Explanation:

• "Geek" in s: checks if the substring "Geek" exists in text.
• "For" in s: checks for "For" in text.

Using operator.contains() Method

The operator.contains() function checks for substring presence in a string programmatically. It provides the same result as the in operator but belongs to Python’s operator module, making it useful in functional programming contexts.

importoperatorasops="Geeks welcome to the Geek Kingdom!"s2="Geek"ifop.contains(s,s2):print("Yes")else:print("No")

Yes

Explanation:op.contains(s, s2) returns True if s2 is found within s, otherwise False.

Using find() Method

The find() method scans the string to locate a specific substring. It returns the starting index of the first occurrence if found; otherwise, it returns -1. This makes it useful for verifying substring presence and identifying its position within a string.

s="Geeks welcome to the Geek Kingdom!"s2="Geek"ifs.find(s2)!=-1:print("Yes")else:print("No")

Yes

Explanation:

• s.find(s2) searches for s2 within string.
• If the method returns a value other than -1, it means the substring exists.
• Returning -1 indicates that the substring is not present.

Using index() Method

The index() method works similarly to find() but raises a ValueError if the substring does not exist in the string. It is useful when you need the exact position of the substring and want an explicit error if it’s missing.

s="Geeks welcome to the Geek Kingdom!"print(s.index("Kingdom"))

26

Explanation:

• s.index("Kingdom") returns the position of the first occurrence of 'Kingdom' in s.
• If 'Kingdom' does not exist, it raises a ValueError.

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