The answer to 'difference between gas water heater and electric water heater' is that gas water heaters use natural gas or propane to heat the water, while electric water heaters use electricity. Gas water heaters are generally more efficient and have lower operating costs, but they require a gas line connection. Electric water heaters are simpler to install and don't need a gas line, but they tend to have higher energy costs.
When choosing between a gas or electric water heater, consider factors like your home's existing utilities, energy costs in your area, and your budget. Gas water heaters may be a better option if you have access to natural gas and want to save on energy bills. Electric water heaters can be a good choice if you don't have a gas line or want a simpler installation process.