bash shell scripting error need help urgently

Shell Programming and Scripting
1 
#! /bin/sh
abcd = "Hello world"
 
if [ `grep "$abcd" file1` -gt 0]
then
   echo $abcd 
fi

i got error message that
line3 : abcd: command not found
line5 : [0: command not found
line5 : [1: command not found

i have no idea why i got this message. Can some one help me ???

2 
if [ `grep -c "$abcd" file1` -gt 0];
then
   echo $abcd 
fi

cheers,
Devaraj Takhellambam

3

watch out for spaces around [ and ]

if [ `grep "$abcd" file1` -gt 0 ]
4

And...remove the spaces around the equal sign:

abcd="Hello world"

Regards

5 
abcd="hello world"
echo $abcd

thanks for your help!! but!!
I removed all the white spaces but i still got error message

for this command i got an error message
abcd: command not found.

6

Maybe your shell don't like the syntax, try this:

#!/bin/sh
abcd="Hello world"

grep "$abcd" file > /dev/null

if [ $? -eq 0 ]
then
   echo "$abcd"
fi
7

thanks everyone !! all solved !!!