SHELL

batch script loop

// batch for loop
for /l %%x in (1, 1, 100) do (
   echo %%x
   copy %%x.txt z:whateveretc
)

for loop batch

for %%variable in (strings/numbers) do( 
	your code 
)  
for /f ["options"] %%variable in (filename) do (
	your code 
)                
for /l ["options"] %%variable in (start_value, increment_by ,end_value) do (
	your code
)
Here ["options"]:
delims=xxx   The delimiter character(s). Default value = a space

eol=;        Default value is ; .If the line starts with ; 
it will be treated as comment and it will
not be printed in the output. 
You can change the Default value to any other character.

tokens=n     Specifies which numbered items to read from each line. 
Default value is 1.

batch script loop

for /l %x in (1, 1, 100) do (
   echo %x
   copy %x.txt z:whateveretc
)

batch prompt loop

@echo off
:main
	:: Put all your code here under the "main" sub-routine
    echo EXECUTED MAIN
    goto rerun_prompt

:rerun_prompt
	ECHO Re-run the script? [Y/N]: 
	SET /p choice=
	IF /I %choice% == Y	goto main
	IF /I %choice% == N (
		echo Exiting...
		EXIT
	)
	ECHO "%choice%" is not valid, try again
	goto rerun_prompt

batch for loop

for /l %%x in (1, 1, 100) do (
   echo %%x
)