Substring PositionsImplement Python program to display all positions of a sub string in the given main string Constraints:NAExample:Sample Input-1:this is pythonisSample Output-1:Sub string is at position 3Sub string is at position 6

Sure, here is a step-by-step guide on how to implement a Python program to display all positions of a substring in the given main string.

Step 1: Define the main string and the substring.

main_string = "this is pythonis"
sub_string = "is"

Step 2: Initialize an empty list to store the positions of the substring.

positions = []

Step 3: Use a for loop to iterate over the main string. For each iteration, check if the substring is found within the main string starting from the current index.

for i in range(len(main_string)):
    if main_string[i:i+len(sub_string)] == sub_string:
        positions.append(i)

Step 4: Print the positions of the substring in the main string.

for position in positions:
    print("Sub string is at position", position)

When you run this program with the given main string and substring, it will print the positions of the substring in the main string.