How to concatenate strings with special characters?

[tondapi]

Hi,

How can I concatenate Start time and duration in below format. Right now I am using this, but it is only half working.

... | eval newField= Start_time."".duration 

Desired format : 01:40[20m]

[woodcock]

You just need spacing, like this:

...| eval newField = Start_time . "[" . duration . "]"