Inline if shell script

Question

Is it possible to execute shell script in command line like this :

counter=`ps -ef | grep -c \"myApplication\"`; if [ $counter -eq 1 ] then; echo \"true\";
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Answer 1

I am using Mac OS and following worked very well

$ counter=`ps -ef | grep -c "myApplication"`; if [ $counter -eq 1 ]; then echo "true";fi;

true

Space is needed after [ and before ]