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Breaking out of an if statement

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# 1  
Old 02-24-2013
Breaking out of an if statement
i have a nested if statement. i need to check for a condition (highlighted in red below). if condition is true, i need the if statement to break out of the statement and then return to the if statement section i have highlighted in blue.

is this possible?
Code:
if [ ... ] ; then
#return here
            echo "one" 
   if [ ... ] ; then
            echo "two"
      if [ ... ] ; then
             echo "three"
             if [ "$a" = "$b" ] ; then
                   break
             fi
         if [ ... ] ; then
fi
   fi
      fi
         fi

This User Gave Thanks to SkySmart For This Post:
# 2  
Old 02-24-2013
Take a look at the 'while' statement: Loop Control
# 3  
Old 02-25-2013
Your fi indentation is highly individual, unusual, and misleading, not for the shell, but for the occasional reader!
You can't break out of if constructs, only out of loops. To arrive where you are heading for, you need to reorder/rewrite the entire if- tree.
# 4  
Old 02-25-2013
You could write the if statement into a function and simply return:

Code:
function process_my_if() {
  if [ ... ] ; then
     #return here
     echo "one" 
     if [ ... ] ; then
        echo "two"
        if [ ... ] ; then
               echo "three"
               if [ "$a" = "$b" ] ; then
                     return
               fi
               if [ ... ] ; then
                  # nothing here
                  :
               fi
        fi
     fi
  fi
}

Last edited by Chubler_XL; 02-25-2013 at 11:58 PM..
# 5  
Old 02-26-2013
Quote:
Originally Posted by Chubler_XL
You could write the if statement into a function and simply return:

Code:
function process_my_if() {
  if [ ... ] ; then
     #return here
     echo "one" 
     if [ ... ] ; then
        echo "two"
        if [ ... ] ; then
               echo "three"
               if [ "$a" = "$b" ] ; then
                     return
               fi
               if [ ... ] ; then
                  # nothing here
                  :
               fi
        fi
     fi
  fi
}

looks like this could work..

will this return me to the part of the code that says "return here"?
# 6  
Old 02-26-2013
no, it will break out of function entirely.
RudiC statement above still stands.
# 7  
Old 02-26-2013
Quote:
Originally Posted by SkySmart
looks like this could work..

will this return me to the part of the code that says "return here"?
No, for that you would need a looping statement like while:

Code:
if [ ... ] ; then
   while true
   do
      #return here
      echo "one" 
      if [ ... ] ; then
         echo "two"
         if [ ... ] ; then
            echo "three"
            if [ "$a" = "$b" ] ; then
               continue
            fi
            if [ ... ] ; then
               # nothing here
               :
            fi
         fi
      fi
      break
   done
fi

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