Windows Batch Script: string operations

• substring:

  set "var=apple pear"
  
  echo %var~6,4%
  REM pear
  
  echo %var~0,-5% 
  REM apple
  

• replace character:

  set "var=a,b,c"
  
  REM replace commas with spaces
  echo %var:,= %
  REM a b c
  

see also

• What is the best way to do a substring in a batch file?