#!/bin/bash# wh-loopc.sh: Count to 10 in a "while" loop.LIMIT=10a=1while [ "$a" -le $LIMIT ]do  echo -n "$a "  let "a+=1"done           # No surprises, so far.echo; echo# +=================================================================+# Now, repeat with C-like syntax.((a = 1))      # a=1# Double parentheses permit space when setting a variable, as in C.while (( a <= LIMIT ))   # Double parentheses, and no "$" preceding variables.do  echo -n "$a "  ((a += 1))   # let "a+=1"  # Yes, indeed.  # Double parentheses permit incrementing a variable with C-like syntax.doneecho# C programmers can feel right at home in Bash.exit 0