Replace lines that have no digits with some constant word [closed]

manpreet Best Answer 3 years ago

I have a file with about 10000 lines like the examples shown below.  I need to replace the lines that do not contain any digits with some word; e.g., input.  How I can do this please?

Example:

The list I have is like this:

1234561
Winstead
Adesuwa1985
Trinity
Angela41
Anita
Tracey
sdojsodsd

I want results like this, where the lines that do not have any number are replaced with the word “input”:

1234561
input
Adesuwa1985
input
Angela41
input
input
input