If you want to execute a d 1 through d 100, you could generate that sequence of commands with seq and pipe it directly to mail:

i=1; while [ $i -le 100 ]; do echo d $i; i=$(($i+1)); done | mail

If you want to execute a d 1 through d 100, you could generate that sequence of commands and pipe it directly to mail:

i=1; while [ $i -le 100 ]; do echo d $i; i=$(($i+1)); done | mail

If you want to execute a d 1 through d 100, you could generate that sequence of commands with seq and pipe it directly to mail:

seq -f "d %g" 1 100 | mail

If you want to execute a d 1 through d 100, you could generate that sequence of commands with seq and pipe it directly to mail:

i=1; while [ $i -le 100 ]; do echo d $i; i=$(($i+1)); done | mail