#!/bin/bash# nested-loop.sh: Nested "for" loops.outer=1             # Set outer loop counter.# Beginning of outer loop.for a in 1 2 3 4 5do  echo "Pass $outer in outer loop."  echo "---------------------"  inner=1           # Reset inner loop counter.  # ===============================================  # Beginning of inner loop.  for b in 1 2 3 4 5  do    echo "Pass $inner in inner loop."    let "inner+=1"  # Increment inner loop counter.  done  # End of inner loop.  # ===============================================  let "outer+=1"    # Increment outer loop counter.   echo              # Space between output blocks in pass of outer loop.done               # End of outer loop.exit 0