How to make a shell script quieter?

[David Aldrich]

Hi

Some of my Jenkins jobs run bash shell scripts that are stored in Subversion.  
The scripts are quite complex and may contain 'for' loops:

For example:

for Simulation in $SimulationsList_1
do
    cd $SIM_PATH_1/$Simulation
    zip -qr $SIM_PATH_1/$Simulation'_'$BUILD_NUMBER *
done

The Jenkins console output for such a loop is quite noisy.  For example, the 
'for' statement is printed in every iteration.

Is there a way of making a script command silent?  For example, I would like to 
make the line containing 'for' silent.

Best regards

David