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Evaluating expressions in windows batch script

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;

5

1

This one could turn out as the dumbest question ever, as I am probably missing out the obvious. Anyway, here it is: Can you evaluate expressions in a batch script. For example, I want to add two numbers and print the result:

echo 4+2

This will just print "4+2", not "6". Maybe I am taking batch scripting on windows a little bit too far...

Thanks!

windows scripting batch

share|improve this question

asked Aug 28 '09 at 15:27

raoulssonraoulsson

1,86862729

add a comment | 

5

1

This one could turn out as the dumbest question ever, as I am probably missing out the obvious. Anyway, here it is: Can you evaluate expressions in a batch script. For example, I want to add two numbers and print the result:

echo 4+2

This will just print "4+2", not "6". Maybe I am taking batch scripting on windows a little bit too far...

Thanks!

windows scripting batch

share|improve this question

asked Aug 28 '09 at 15:27

raoulssonraoulsson

1,86862729

add a comment | 

This one could turn out as the dumbest question ever, as I am probably missing out the obvious. Anyway, here it is: Can you evaluate expressions in a batch script. For example, I want to add two numbers and print the result:

echo 4+2

This will just print "4+2", not "6". Maybe I am taking batch scripting on windows a little bit too far...

Thanks!

windows scripting batch

share|improve this question

asked Aug 28 '09 at 15:27

raoulssonraoulsson

1,86862729

echo 4+2

share|improve this question

asked Aug 28 '09 at 15:27

raoulssonraoulsson

1,86862729

share|improve this question

asked Aug 28 '09 at 15:27

raoulssonraoulsson

1,86862729

asked Aug 28 '09 at 15:27

raoulssonraoulsson

1,86862729

asked Aug 28 '09 at 15:27

raoulssonraoulsson

1,86862729

3 Answers
3

active

oldest

votes

7

This way:

Set /a 4+2

Or to store it in a variable for later:

Set /a foo = 4+2
echo %foo%

And to answer your last line, there is a good chance that you may be pushing batch a little further than intended. The Windows Script host is available on your machine and would allow VBScript or JScript. Also if you are going to learn something new anyway I would highly suggest using Powershell instead.

share|improve this answer

edited Aug 28 '09 at 15:45

answered Aug 28 '09 at 15:32

EBGreenEBGreen

1,323910

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  that's echo %foo%
  
  – Bob
  Aug 28 '09 at 15:42
  

  
  
  
  

add a comment | 

3

set Result=0

echo start %Result%

echo Adding 4 and 2
set /a Result= 4+2

echo finish %result%

pause >nul

share|improve this answer

answered Aug 28 '09 at 15:37

IzzyIzzy

7,85522634

add a comment | 

0

If you have bash/perl installed (eg. cygwin), just call them to do the math:

@for /f "delims=" %%a in ('perl -e "print(%*)"' ) do @set RESULT=%%a
@echo %RESULT%

@for /f "delims=" %%a in ('bash -c "echo $((%*))"' ) do @set RESULT=%%a 
@echo %RESULT%

Sample result:

c:> script.cmd 2**10/3
341.333333333333
341

share|improve this answer

answered Apr 17 at 21:34

moshmosh

112

add a comment | 

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7

This way:

Set /a 4+2

Or to store it in a variable for later:

Set /a foo = 4+2
echo %foo%

And to answer your last line, there is a good chance that you may be pushing batch a little further than intended. The Windows Script host is available on your machine and would allow VBScript or JScript. Also if you are going to learn something new anyway I would highly suggest using Powershell instead.

share|improve this answer

edited Aug 28 '09 at 15:45

answered Aug 28 '09 at 15:32

EBGreenEBGreen

1,323910

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  that's echo %foo%
  
  – Bob
  Aug 28 '09 at 15:42
  

  
  
  
  

add a comment | 

7

This way:

Set /a 4+2

Or to store it in a variable for later:

Set /a foo = 4+2
echo %foo%

And to answer your last line, there is a good chance that you may be pushing batch a little further than intended. The Windows Script host is available on your machine and would allow VBScript or JScript. Also if you are going to learn something new anyway I would highly suggest using Powershell instead.

share|improve this answer

edited Aug 28 '09 at 15:45

answered Aug 28 '09 at 15:32

EBGreenEBGreen

1,323910

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  that's echo %foo%
  
  – Bob
  Aug 28 '09 at 15:42
  

  
  
  
  

add a comment | 

This way:

Set /a 4+2

Or to store it in a variable for later:

Set /a foo = 4+2
echo %foo%

And to answer your last line, there is a good chance that you may be pushing batch a little further than intended. The Windows Script host is available on your machine and would allow VBScript or JScript. Also if you are going to learn something new anyway I would highly suggest using Powershell instead.

share|improve this answer

edited Aug 28 '09 at 15:45

answered Aug 28 '09 at 15:32

EBGreenEBGreen

1,323910

Set /a 4+2

Set /a foo = 4+2
echo %foo%

share|improve this answer

edited Aug 28 '09 at 15:45

answered Aug 28 '09 at 15:32

EBGreenEBGreen

1,323910

answered Aug 28 '09 at 15:32

EBGreenEBGreen

1,323910

answered Aug 28 '09 at 15:32

EBGreenEBGreen

1,323910

3

set Result=0

echo start %Result%

echo Adding 4 and 2
set /a Result= 4+2

echo finish %result%

pause >nul

share|improve this answer

answered Aug 28 '09 at 15:37

IzzyIzzy

7,85522634

add a comment | 

3

set Result=0

echo start %Result%

echo Adding 4 and 2
set /a Result= 4+2

echo finish %result%

pause >nul

share|improve this answer

answered Aug 28 '09 at 15:37

IzzyIzzy

7,85522634

add a comment | 

set Result=0

echo start %Result%

echo Adding 4 and 2
set /a Result= 4+2

echo finish %result%

pause >nul

share|improve this answer

answered Aug 28 '09 at 15:37

IzzyIzzy

7,85522634

set Result=0

echo start %Result%

echo Adding 4 and 2
set /a Result= 4+2

echo finish %result%

pause >nul

share|improve this answer

answered Aug 28 '09 at 15:37

IzzyIzzy

7,85522634

answered Aug 28 '09 at 15:37

IzzyIzzy

7,85522634

answered Aug 28 '09 at 15:37

IzzyIzzy

7,85522634

0

If you have bash/perl installed (eg. cygwin), just call them to do the math:

@for /f "delims=" %%a in ('perl -e "print(%*)"' ) do @set RESULT=%%a
@echo %RESULT%

@for /f "delims=" %%a in ('bash -c "echo $((%*))"' ) do @set RESULT=%%a 
@echo %RESULT%

Sample result:

c:> script.cmd 2**10/3
341.333333333333
341

share|improve this answer

answered Apr 17 at 21:34

moshmosh

112

add a comment | 

0

If you have bash/perl installed (eg. cygwin), just call them to do the math:

@for /f "delims=" %%a in ('perl -e "print(%*)"' ) do @set RESULT=%%a
@echo %RESULT%

@for /f "delims=" %%a in ('bash -c "echo $((%*))"' ) do @set RESULT=%%a 
@echo %RESULT%

Sample result:

c:> script.cmd 2**10/3
341.333333333333
341

share|improve this answer

answered Apr 17 at 21:34

moshmosh

112

add a comment | 

If you have bash/perl installed (eg. cygwin), just call them to do the math:

@for /f "delims=" %%a in ('perl -e "print(%*)"' ) do @set RESULT=%%a
@echo %RESULT%

@for /f "delims=" %%a in ('bash -c "echo $((%*))"' ) do @set RESULT=%%a 
@echo %RESULT%

Sample result:

c:> script.cmd 2**10/3
341.333333333333
341

share|improve this answer

answered Apr 17 at 21:34

moshmosh

112

@for /f "delims=" %%a in ('perl -e "print(%*)"' ) do @set RESULT=%%a
@echo %RESULT%

@for /f "delims=" %%a in ('bash -c "echo $((%*))"' ) do @set RESULT=%%a 
@echo %RESULT%

c:> script.cmd 2**10/3
341.333333333333
341

share|improve this answer

answered Apr 17 at 21:34

moshmosh

112

answered Apr 17 at 21:34

moshmosh

112

answered Apr 17 at 21:34

moshmosh

112