String Comparision

[ashishmann]

Hello,
I want to check for a string in if condition
string = "a b c d"

if [ $string == "a b c d" ];then
echo MATCH
else
echo DIFFERENT
fi

Its giving an error in if statement ( too many arguements)
Do I need to use regex for that comparison as string also have spaces between them?

[alf55]

Hello,
I want to check for a string in if condition
string = "a b c d"

if [ $string == "a b c d" ];then
echo MATCH
else
echo DIFFERENT
fi

Its giving an error in if statement ( too many arguements)
Do I need to use regex for that comparison as string also have spaces between them?

The problem that you are seeing is that the value of "string" is expanded in the statement before it is evaluated. In your case the statement would be (assuming string is "a b c d"):

if [ a b c d == "a b c d" ] ; then

And as you see it is not a string to string comparison. To allow it to work do either of the following:

if [ "$string" == "a b c d" ] ; then

or

if [ "${string}" == "a b c d" ] ; then

[AlphaLexman]

string = "a b c d"

Also, make sure you do NOT put [spaces] around the equal sign...

string="a b c d"

[ashishmann]

Thanks..It Worked..