What is the meaning of the below declarations?

Answer:

1. The “a” is a constant integer.
2. Similar to first, “a” is a constant integer.
3. Here “a” is a pointer to a const integer, the value of the integer is not modifiable, but the pointer is modifiable.
4. Here “a” is a const pointer to an integer, the value of the pointed integer is modifiable, but the pointer is not modifiable.
5. Here “a” is a const pointer to a const integer that means the value of the pointed integer and pointer both are not modifiable.