What will be the output of the following code?str1=" An apple a day keeps doctor away"print(str1.find("a"),end=" ")print(str1.find("m"),end=" ")print(str1.find("day"),end=" ")str1=str1[ : :-1]print(str1.find("y"),end=" ")

The output of the code will be:

4 -1 12 2

Here's the step by step explanation:

1. The find() function in Python is used to find the index of a substring in a string. It returns the lowest index where the substring is found. If the substring is not found, it returns -1.

2. str1.find("a") will return 4 because the first occurrence of "a" (ignoring case) is at the 4th index.

3. str1.find("m") will return -1 because "m" is not found in the string.

4. str1.find("day") will return 12 because "day" starts at the 12th index.

5. str1[ : :-1] will reverse the string. So, the string becomes "yawa rotcod speek yad a elppa nA".

6. str1.find("y") will return 2 because after reversing the string, the first occurrence of "y" is at the 2nd index.