Sure, here is a simple Python program that finds a substring in a given string:

```python
def find_substring(main_string, sub_string):
if main_string.find(sub_string) != -1:
print("Substring found")
else:
print("Substring not found")

# Test the function
find_substring("Hello, world!", "world")
```

In this program, we define a function `find_substring` that takes two arguments: `main_string` and `sub_string`. The function uses the `find` method of the string object, which returns the lowest index of the substring if found in given string. If it's not found, it returns -1. So, if the result of `find` is not -1, we print "Substring found", otherwise we print "Substring not found".

Finally, we test the function with the string "Hello, world!" and the substring "world".

Question

Sure, here is a simple Python program that finds a substring in a given string:

```python
def find_substring(main_string, sub_string):
    if main_string.find(sub_string) != -1:
        print("Substring found")
    else:
        print("Substring not found")

# Test the function
find_substring("Hello, world!", "world")
```

In this program, we define a function `find_substring` that takes two arguments: `main_string` and `sub_string`. The function uses the `find` method of the string object, which returns the lowest index of the substring if found in given string. If it's not found, it returns -1. So, if the result of `find` is not -1, we print "Substring found", otherwise we print "Substring not found".

Finally, we test the function with the string "Hello, world!" and the substring "world".

Knowee AI · Accepted Answer

Sure, here is a simple Python program that finds a substring in a given string:

```python
def find_substring(main_string, sub_string):
    if main_string.find(sub_string) != -1:
        print("Substring found")
    else:
        print("Substring not found")

# Test the function
find_substring("Hello, world!", "world")
```

In this program, we define a function `find_substring` that takes two arguments: `main_string` and `sub_string`. The function uses the `find` method of the string object, which returns the lowest index of the substring if found in given string. If it's not found, it returns -1. So, if the result of `find` is not -1, we print "Substring found", otherwise we print "Substring not found".

Finally, we test the function with the string "Hello, world!" and the substring "world".

Write a program to find the substring of a given string.

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