Cmake version check fails with version = 3.10.2

I have installed apt-get install cmake on Ubuntu 18.04
cmake --version
cmake version 3.10.2

cmake_version=`cmake --version | grep "cmake version" | awk '

'`
if [ "$cmake_version" \< "3.7.1" ] ; then

If condition failed and 3.10.2 > 3.7.1, but still its installing build from source cmake version.