How this windows command works: echo %path:;=&echo.%

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Seeking to find a solution to print out path parameters of the windows CMD i came to this solution. the answer is this commad:



echo %path:;=&echo.%


now i wonder how this command works






command-line







share|improve this question



























    up vote
    3
    down vote

    favorite












    Seeking to find a solution to print out path parameters of the windows CMD i came to this solution. the answer is this commad:



    echo %path:;=&echo.%


    now i wonder how this command works






    command-line







    share|improve this question

























      up vote
      3
      down vote

      favorite









      up vote
      3
      down vote

      favorite











      Seeking to find a solution to print out path parameters of the windows CMD i came to this solution. the answer is this commad:



      echo %path:;=&echo.%


      now i wonder how this command works






      command-line







      share|improve this question















      Seeking to find a solution to print out path parameters of the windows CMD i came to this solution. the answer is this commad:



      echo %path:;=&echo.%


      now i wonder how this command works






      command-line




      command-line






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 2 hours ago

























      asked 3 hours ago









      yekanchi

      203




      203




















          1 Answer
          1






          active

          oldest

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          up vote
          3
          down vote



          accepted










          That's an interesting solution that I've never seen before. Let me try to explain:



          1. To print the entire path, use echo %path%. This will print all directories on a single line separated with semicolons (;)

          2. To search / replace a string in a variable, use %path:a=b% which will replace all a characters with b


          3. echo. is the command to print a newline


          4. & is used to separate commands, e.g. echo line1&echo line2 will print two lines

          5. In effect, semicolons in the path are replaced with a command to print a newline. Or maybe it is interpreted as 'replace ; with nothing, and then, print a newline'. I can't find any documentation on this, so it's just my interpretation. Frankly, I didn't even know that was possible, but there you go.





          share|improve this answer




















          • what is %% signs used for, can;t we tell echo path? are %% used for variables?
            – yekanchi
            2 hours ago






          • 1




            Yes, that is correct, those are used to get the value of a variable. For instance: set greeting=Hello and then echo %greeting%. Confusingly, PATH happens to be both a command and a variable, so typing the command path, or echo %path% will have the same result.
            – Berend
            2 hours ago











          • what this syntax is called? is it regex? or something used in windows CMD only
            – yekanchi
            2 hours ago










          • I'm not sure if there's a name for this, it is just the way variables work in DOS. Other languages, such as bash, use $PATH for instance.
            – Berend
            2 hours ago










          • This is not regex, its cmd only. That's why I removed the regex tag from the question. The correct naming would be Command Line Syntax.
            – LPChip
            2 hours ago











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          1 Answer
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          1 Answer
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          active

          oldest

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          active

          oldest

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          active

          oldest

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          up vote
          3
          down vote



          accepted










          That's an interesting solution that I've never seen before. Let me try to explain:



          1. To print the entire path, use echo %path%. This will print all directories on a single line separated with semicolons (;)

          2. To search / replace a string in a variable, use %path:a=b% which will replace all a characters with b


          3. echo. is the command to print a newline


          4. & is used to separate commands, e.g. echo line1&echo line2 will print two lines

          5. In effect, semicolons in the path are replaced with a command to print a newline. Or maybe it is interpreted as 'replace ; with nothing, and then, print a newline'. I can't find any documentation on this, so it's just my interpretation. Frankly, I didn't even know that was possible, but there you go.





          share|improve this answer




















          • what is %% signs used for, can;t we tell echo path? are %% used for variables?
            – yekanchi
            2 hours ago






          • 1




            Yes, that is correct, those are used to get the value of a variable. For instance: set greeting=Hello and then echo %greeting%. Confusingly, PATH happens to be both a command and a variable, so typing the command path, or echo %path% will have the same result.
            – Berend
            2 hours ago











          • what this syntax is called? is it regex? or something used in windows CMD only
            – yekanchi
            2 hours ago










          • I'm not sure if there's a name for this, it is just the way variables work in DOS. Other languages, such as bash, use $PATH for instance.
            – Berend
            2 hours ago










          • This is not regex, its cmd only. That's why I removed the regex tag from the question. The correct naming would be Command Line Syntax.
            – LPChip
            2 hours ago















          up vote
          3
          down vote



          accepted










          That's an interesting solution that I've never seen before. Let me try to explain:



          1. To print the entire path, use echo %path%. This will print all directories on a single line separated with semicolons (;)

          2. To search / replace a string in a variable, use %path:a=b% which will replace all a characters with b


          3. echo. is the command to print a newline


          4. & is used to separate commands, e.g. echo line1&echo line2 will print two lines

          5. In effect, semicolons in the path are replaced with a command to print a newline. Or maybe it is interpreted as 'replace ; with nothing, and then, print a newline'. I can't find any documentation on this, so it's just my interpretation. Frankly, I didn't even know that was possible, but there you go.





          share|improve this answer




















          • what is %% signs used for, can;t we tell echo path? are %% used for variables?
            – yekanchi
            2 hours ago






          • 1




            Yes, that is correct, those are used to get the value of a variable. For instance: set greeting=Hello and then echo %greeting%. Confusingly, PATH happens to be both a command and a variable, so typing the command path, or echo %path% will have the same result.
            – Berend
            2 hours ago











          • what this syntax is called? is it regex? or something used in windows CMD only
            – yekanchi
            2 hours ago










          • I'm not sure if there's a name for this, it is just the way variables work in DOS. Other languages, such as bash, use $PATH for instance.
            – Berend
            2 hours ago










          • This is not regex, its cmd only. That's why I removed the regex tag from the question. The correct naming would be Command Line Syntax.
            – LPChip
            2 hours ago













          up vote
          3
          down vote



          accepted







          up vote
          3
          down vote



          accepted






          That's an interesting solution that I've never seen before. Let me try to explain:



          1. To print the entire path, use echo %path%. This will print all directories on a single line separated with semicolons (;)

          2. To search / replace a string in a variable, use %path:a=b% which will replace all a characters with b


          3. echo. is the command to print a newline


          4. & is used to separate commands, e.g. echo line1&echo line2 will print two lines

          5. In effect, semicolons in the path are replaced with a command to print a newline. Or maybe it is interpreted as 'replace ; with nothing, and then, print a newline'. I can't find any documentation on this, so it's just my interpretation. Frankly, I didn't even know that was possible, but there you go.





          share|improve this answer












          That's an interesting solution that I've never seen before. Let me try to explain:



          1. To print the entire path, use echo %path%. This will print all directories on a single line separated with semicolons (;)

          2. To search / replace a string in a variable, use %path:a=b% which will replace all a characters with b


          3. echo. is the command to print a newline


          4. & is used to separate commands, e.g. echo line1&echo line2 will print two lines

          5. In effect, semicolons in the path are replaced with a command to print a newline. Or maybe it is interpreted as 'replace ; with nothing, and then, print a newline'. I can't find any documentation on this, so it's just my interpretation. Frankly, I didn't even know that was possible, but there you go.






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 2 hours ago









          Berend

          1,2431612




          1,2431612











          • what is %% signs used for, can;t we tell echo path? are %% used for variables?
            – yekanchi
            2 hours ago






          • 1




            Yes, that is correct, those are used to get the value of a variable. For instance: set greeting=Hello and then echo %greeting%. Confusingly, PATH happens to be both a command and a variable, so typing the command path, or echo %path% will have the same result.
            – Berend
            2 hours ago











          • what this syntax is called? is it regex? or something used in windows CMD only
            – yekanchi
            2 hours ago










          • I'm not sure if there's a name for this, it is just the way variables work in DOS. Other languages, such as bash, use $PATH for instance.
            – Berend
            2 hours ago










          • This is not regex, its cmd only. That's why I removed the regex tag from the question. The correct naming would be Command Line Syntax.
            – LPChip
            2 hours ago

















          • what is %% signs used for, can;t we tell echo path? are %% used for variables?
            – yekanchi
            2 hours ago






          • 1




            Yes, that is correct, those are used to get the value of a variable. For instance: set greeting=Hello and then echo %greeting%. Confusingly, PATH happens to be both a command and a variable, so typing the command path, or echo %path% will have the same result.
            – Berend
            2 hours ago











          • what this syntax is called? is it regex? or something used in windows CMD only
            – yekanchi
            2 hours ago










          • I'm not sure if there's a name for this, it is just the way variables work in DOS. Other languages, such as bash, use $PATH for instance.
            – Berend
            2 hours ago










          • This is not regex, its cmd only. That's why I removed the regex tag from the question. The correct naming would be Command Line Syntax.
            – LPChip
            2 hours ago
















          what is %% signs used for, can;t we tell echo path? are %% used for variables?
          – yekanchi
          2 hours ago




          what is %% signs used for, can;t we tell echo path? are %% used for variables?
          – yekanchi
          2 hours ago




          1




          1




          Yes, that is correct, those are used to get the value of a variable. For instance: set greeting=Hello and then echo %greeting%. Confusingly, PATH happens to be both a command and a variable, so typing the command path, or echo %path% will have the same result.
          – Berend
          2 hours ago





          Yes, that is correct, those are used to get the value of a variable. For instance: set greeting=Hello and then echo %greeting%. Confusingly, PATH happens to be both a command and a variable, so typing the command path, or echo %path% will have the same result.
          – Berend
          2 hours ago













          what this syntax is called? is it regex? or something used in windows CMD only
          – yekanchi
          2 hours ago




          what this syntax is called? is it regex? or something used in windows CMD only
          – yekanchi
          2 hours ago












          I'm not sure if there's a name for this, it is just the way variables work in DOS. Other languages, such as bash, use $PATH for instance.
          – Berend
          2 hours ago




          I'm not sure if there's a name for this, it is just the way variables work in DOS. Other languages, such as bash, use $PATH for instance.
          – Berend
          2 hours ago












          This is not regex, its cmd only. That's why I removed the regex tag from the question. The correct naming would be Command Line Syntax.
          – LPChip
          2 hours ago





          This is not regex, its cmd only. That's why I removed the regex tag from the question. The correct naming would be Command Line Syntax.
          – LPChip
          2 hours ago


















           

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