Which state of India has the highest and the lowest population density as per 2011 census?

Explanation

### Step-by-Step Solution:

1. **Understanding Population Density**: Population density is defined as the number of people living per unit area, usually expressed as people per square kilometer. To determine which state has the highest and lowest population density, we need to look at the total population and the area of each state.

2. **Referencing the 2011 Census**: The 2011 Census of India provides data on the population of each state. According to the census, India's total population was approximately 1.03 billion.

3. **Identifying the State with the Highest Population**: From the data, Uttar Pradesh was identified as the state with the highest population, which was approximately 199,812,341 people.

...