a = 'Dev.to'
a[::-1]

Explanation :

[start index : end index : step parameter ]

• The first colon : indicates the start index (default is the beginning of the sequence).
• The second colon : indicates the end index (default is the end of the sequence).
• The third colon : indicates the step parameter, which means the sequence should be traversed in steps of -1 (i.e., in reverse)..