public static int getParamInt() {
		return NumberUtils.toInt(getParam("0"), 0);
	}
Get the parameter passed by controller. When it's executed in the
validation mode, always returns the given default value 0.

@return param. 0 if the param was not provided.
@since 3.2.3
ngrinder-runtime/src/main/java/net/grinder/util/GrinderUtils.java