Batch Script – Replace a String

In this article, we are going to Replace a substring with any given string.

@echo off 
set str=GFG is the platform for geeks. 
echo %str% 

set str=%str:the=best% 
echo %str%
pause

In the above example, we are going to replace ‘the’ by substring ‘best’ using %str:the=best% statement.

Explanation :

set str=input string

In the next line using ‘ echo %str% ‘ we are printing our string.
Using ‘ %str:the=best%’ statement , we are replacing substring ‘the’ with ‘best’.
Then using ‘pause’, to hold the screen until any key is pressed, so that we can read our output.

Output :

‘the’ is replaced by ‘best’

@echo off 
set str=GFG is the platform for geeks.
set word=best
echo %str% 

call set str=%%str:the=%word%%%
echo %str%
pause

Explanation :

Everything is as same as before, we are trying to replace the word ‘the’ with ‘best’ but we can also do this by calling another variable ‘word’ which is equal to ‘best’.
By using call there is another layer of variable expansion so we have to use ‘%’ for ‘word’ so that it will use ‘best’ as its value and replace the string.

output by 2nd approach

Article Tags :

Linux-Unix