Chapter 10: Problem 20

The ___ function searches for a string inside of another one.

Short Answer

Expert verified

Answer: The find() method returns -1 when the specified string is not found within another string.

Step by step solution

Understanding the concept

The ___ function is a method that searches for a specific string within another string. If the specified value is found, the function returns the position of the first character of the found substring. Otherwise, it returns -1.

Choose a programming language

Different programming languages have similar functions with slightly different names and syntax. For this example, let's choose Python and use the `find()` method. Note that similar functions/methods are available in other languages like JavaScript (`indexOf()`), Java (`indexOf()`), and C# (`IndexOf()`).

Declare a string and the search value

First, declare a string (the one to be searched) and the search value (the substring you're looking for). For example: ```python text = "Hello, world! Welcome to the universe!" search_value = "world" ```

Use the find() method

Now, use the `find()` method on the main string and pass the search value as its argument. The method will return the index position where the search value starts in the main string, or -1 if it's not found. For example: ```python position = text.find(search_value) print(position) # Output: 7 ```

Handle the result

Based on the result (index position or -1), you can handle the outcome. For example, you can print a message if the search value is found in the main string or a different message if it's not found: ```python if position != -1: print(f"'{search_value}' found at index {position}") else: print(f"'{search_value}' not found in the text") ``` By following these steps, you can search for a string inside another one using the `find()` method in Python or similar functions/methods in other programming languages.

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The ___ function searches for a string inside of another one.

Short Answer

Step by step solution

Understanding the concept

Choose a programming language

Declare a string and the search value

Use the find() method

Handle the result

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