FOR /L

Conditionally perform a command for a range of numbers.

Syntax   
      FOR /L %%parameter IN (start,step,end) DO command 

Key
   start       : The first number  
   step        : The amount by which to increment the sequence 
   end         : The last number 

   command     : The command to carry out, including any 
                 command-line parameters.

   %%parameter : A replaceable parameter:
                 in a batch file use %%G (on the command line %G)

So (20,-5,10) would generate the sequence (20 15 10)

(1,1,5) would generate the sequence 1 2 3 4 5

The numbers must all be within the range of 32 bit signed integer numbers (-2,147,483,648 through 2,147,483,647)

In addition to integer numbers, hex and octal numbers can also be compared within certain limits.

If the start,step,end are left null or (0) then the command will loop indefinitely, Ctrl-C will abort the whole script.

Examples

Count from 1 up to 5

FOR /L %%G IN (1,1,5) DO echo %%G

Non-numeric lists can use a standard FOR command:

FOR %%G IN (Sun Mon Tue Wed Thur Fri Sat) DO echo %%G

FOR is an internal command.

"A great deal of what makes life congenial is a sequence of little white lies" - Philip Terzian

Related:

FOR - Loop commands
FOR - Loop through a set of files in one folder
FOR /R - Loop through files (recurse subfolders)
FOR /D
- Loop through several folders
FOR /F - Loop through items in a text file
FOR /F - Loop through the output of a command
FORFILES - Batch process multiple files
GOTO - Direct a batch program to jump to a labelled line
IF - Conditionally perform a command
Powershell: ForEach-Object - Loop for each object in the pipeline / While
Equivalent bash command (Linux): for - Expand words, and execute commands


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