mirror of https://github.com/tLDP/LDP
63 lines
1.1 KiB
Bash
63 lines
1.1 KiB
Bash
#!/bin/bash
|
|
|
|
a=24
|
|
b=47
|
|
|
|
if [ "$a" -eq 24 ] && [ "$b" -eq 47 ]
|
|
then
|
|
echo "Test #1 succeeds."
|
|
else
|
|
echo "Test #1 fails."
|
|
fi
|
|
|
|
# ERROR: if [ "$a" -eq 24 && "$b" -eq 47 ]
|
|
#+ attempts to execute ' [ "$a" -eq 24 '
|
|
#+ and fails to finding matching ']'.
|
|
#
|
|
# Note: if [[ $a -eq 24 && $b -eq 24 ]] works.
|
|
# The double-bracket if-test is more flexible
|
|
#+ than the single-bracket version.
|
|
# (The "&&" has a different meaning in line 17 than in line 6.)
|
|
# Thanks, Stephane Chazelas, for pointing this out.
|
|
|
|
|
|
if [ "$a" -eq 98 ] || [ "$b" -eq 47 ]
|
|
then
|
|
echo "Test #2 succeeds."
|
|
else
|
|
echo "Test #2 fails."
|
|
fi
|
|
|
|
|
|
# The -a and -o options provide
|
|
#+ an alternative compound condition test.
|
|
# Thanks to Patrick Callahan for pointing this out.
|
|
|
|
|
|
if [ "$a" -eq 24 -a "$b" -eq 47 ]
|
|
then
|
|
echo "Test #3 succeeds."
|
|
else
|
|
echo "Test #3 fails."
|
|
fi
|
|
|
|
|
|
if [ "$a" -eq 98 -o "$b" -eq 47 ]
|
|
then
|
|
echo "Test #4 succeeds."
|
|
else
|
|
echo "Test #4 fails."
|
|
fi
|
|
|
|
|
|
a=rhino
|
|
b=crocodile
|
|
if [ "$a" = rhino ] && [ "$b" = crocodile ]
|
|
then
|
|
echo "Test #5 succeeds."
|
|
else
|
|
echo "Test #5 fails."
|
|
fi
|
|
|
|
exit 0
|