#$!/$bin$/$tcsh

total$=0$

for $(($i$=1$;i$<3$;i$++))$

do

total$=`$expr $total $+$ $i$`$

done

echo Total is: $total

a$.$ Total is: $total

b$.$ Total is: $3$

c$.$ Total is: $6$

d$.$ The expr command will cause an error. The bc command should be used instead.

e$.$ The for loop syntax will cause an error in tcsh