Bash Script - Not collateral after echo due to new line

Question

I'm trying to get below output but always output comes with one more newline. How can I obtain desired output?

Desired output: 3 number of line detected

Actual output:

3

number of line is detected.

linecount= awk '{/^./ && c++};END{print c}' < test.txt //// (or cat text.txt | wc -l (both is ok))

if [ -s test.txt ]; then
        echo  $linecount number of line detected
        echo
else
        echo No line detected.
        echo