CODEWITHSUNDEEP
batch-file
Michail N
Michail N

Reputation: 3835

Time comparison in windows batch script

I run this script in windows batch 

set currentTime=%TIME%

if %currentTime% lss 09:00 echo "Before 09:00"

and I get

60 was unexpected at this time.

If I remove the second % my script runs but it incorrectly returns "Before 09:00" no matter what time I compare. (I think it compares 09:00 with the literal %currentTime).

Can anyone help on how to properly compare time?

Upvotes: 1

Views: 5553

Answers (3)

Io-oI
Io-oI

Reputation: 2565

For use pure bat to do this, you need use EnableDelayedExpansion and use substring in time set, and work with if time layout are or not using AM/PM by change if from leq to gtr in %_bit_compare% to parse the procedure, or...

It is some like another thing, that my limited English don't help me to explain to you very well, sorry..: 

@echo off & setlocal EnableDelayedExpansion
set "currentTime=!TIME::=!" & set "currentTime=!currentTime:,=!" & set "conpareTime=900"
(set "_bit_compare=leq" & time /t | findstr /l "AM PM" || set "_bit_compare=gtr" )>nul
if "!currentTime:~0,4=!" %_bit_compare% "!conpareTime!" (echo/ !time:~0,5! Before 09:00) else (echo/ !time:~0,5! After 09:00)

Or, same code in non-compacted form: 

@echo off & setlocal EnableDelayedExpansion

set "currentTime=!TIME::=!" 
set "currentTime=!currentTime:,=!"
set "_bit_compare=leq"
set "conpareTime=900"

(time /t | findstr /l "AM PM" || set "_bit_compare=gtr")>nul

if "!currentTime:~0,4=!" %_bit_compare% "!conpareTime!" (

    echo/ !time:~0,5! Before 09:00

    ) else (

    echo/ !time:~0,5! After 09:00

    )

Upvotes: 1

double-beep
double-beep

Reputation: 5504

You may also do this as follows:

@echo off
setlocal EnableDelayedExpansion

rem Set time to compare to 09:00:00:
set "time_to_compare=090000"

:loop
for /F "skip=1 delims=." %%A IN ('wmic OS get localdatetime') do (
    for /F "delims=" %%B IN ("%%A") do (
        set "_time=%%B"
        if !_time:~-6! GEQ 090000 (call :after) else (call :before)
    )
)

:after
echo It is after 09:00:00^^!
pause>nul
exit /b 0

:before
echo It is before 09:00:00^^!
pause>nul
exit /b 0

I don't know what you want to do. So, if it after, it will call — not goto — :after subroutine and if before, it will call :before.

You can make any other changes you want.

Note: The time will be generated with the 24-hour and HH:mm:ss format; if you meant 21:00:00 change set "time_to_compare=090000" to set "time_to_compare=210000". The way this happened is to prevent misbehaviours. The solution is written in pure batch as requested.

Upvotes: 1

lit
lit

Reputation: 16236

Here is an easy way to do it in a cmd.exe shell .bat file script.

FOR /F "delims=" %%a IN ('powershell -NoL -NoP -Command "(Get-Date).Hour"') DO (SET /A "HOUR=%%a")
IF %HOUR% LSS 9 (
    ECHO "Before 09:00"
)

Upvotes: 4

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