Write a shell script that folds long lines into 40 columns. Thus any line that exceeds 40 characters must be broken after 40th, a “\” is to be appended as the indication of folding and the processing is to be continued with the residue. The input is to be suppl ied through a text file created by the user.

{
if(length($0)<40)
printf"%s",$0
else
{
x=$0
while(length(x)>40)
{
printf"%s\n",substr(x,1,40)
x=substr(x,41,length(x)-40)
}
printf"%s\n",x
}
}

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