Question

what is the condition of multiple echo​

Answer 1

Explanation:

multiple echo statements in if condition

Original Post by wizardofoz

wizardofoz

Hi ,

I have a peculiar problem.

i have an if block like this

Code:

if [ -f $ff ];

then

echo " todays date is " ${date} >> log_file

echo " file count is " $ count >> log_file

mv filename1 filename 2

else

echo "no files available ">> log_file

fi

the echo statement "no files available " is not written to the log file if no files are retrieved by the if loop

Answer 2

Answer:

The intensity of sound should be very high so that multiple echo can take place

Secondly, the distance between sourse sound(echo becomes source sound after original sound ceases) and observer should be such that reflected sound reaches the ear 0.1 seconds after original sound(previous echo ) has ceased.

This is because a sound persists in our ear for about 0.1 seconds