Removing decimal portion to avoid error
Removing decimal portion to avoid error

If your xcode_ver_num has a decimal portion (mine is 61.1) then you would get the following error:
./install.sh: line 37: [[: 61.1: syntax error: invalid arithmetic operator (error token is ".1")

Using a bash expression to remove the decimal portion
From the bash man page:
${parameter%word}
${parameter%%word}
         Remove matching suffix pattern.  The word is expanded to produce a pattern just as in pathname expansion.   If
         the pattern matches a trailing portion of the expanded value of parameter, then the result of the expansion is
         the expanded value of parameter with the shortest matching pattern (the ``%'' case) or  the  longest  matching
         pattern  (the  ``%%'' case) deleted.  If parameter is @ or *, the pattern removal operation is applied to each
         positional parameter in turn, and the expansion is the resultant list.  If parameter is an array variable sub-
         scripted  with  @  or *, the pattern removal operation is applied to each member of the array in turn, and the
         expansion is the resultant list.

Taptera/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS,bodefuwa/SalesforceMobileSDK-iOS,kchitalia/SalesforceMobileSDK-iOS,camflan/SalesforceMobileSDK-iOS,Taptera/SalesforceMobileSDK-iOS