Command not found: adb when executed from adb directory

I just installed the tools for the studio and the Android platform, and I can not call adb , although it is clearly located in the same directory. I get this error:

 zsh: command not found: adb 

I'm new to the Android SDK, so this is probably an easy fix. Any ideas?

Execution Example:

 agconti-Inspiron-5520 :: android-studio/sdk/platform-tools ยป adb 1 โ†ต zsh: command not found: adb agconti-Inspiron-5520 :: android-studio/sdk/platform-tools ยป ll 127 โ†ต total 3.2M -rwxrwx--- 1 agconti agconti 1.3M Jun 21 21:09 adb drwxrwx--- 2 agconti agconti 4.0K Jun 21 21:12 api -rwxrwx--- 1 agconti agconti 47K Jun 21 21:09 dmtracedump -rwxrwx--- 1 agconti agconti 220K Jun 21 21:09 etc1tool -rwxrwx--- 1 agconti agconti 197K Jun 21 21:09 fastboot -rwxrwx--- 1 agconti agconti 9.9K Jun 21 21:09 hprof-conv -rw-rw---- 1 agconti agconti 704K Jun 21 21:12 NOTICE.txt -rw-rw---- 1 agconti agconti 39 Jun 21 21:09 source.properties -rwxrwx--- 1 agconti agconti 754K Jun 21 21:09 sqlite3 drwxrwx--- 2 agconti agconti 4.0K Jun 21 21:09 systrace 
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android android-sdk-tools adb
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1 answer

Using:

 ./adb 

If . is on your way, it will not be found. And for safety . should not be in your way.

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