Which of the following is a valid Integer constant:i. 4ii. 4.0iii. 4.3fiv. "four"

The valid integer constant from the given options is:

i. 4

Explanation:

An integer constant is a sequence of digits. Integers are whole numbers (without a decimal point).

Here's why the other options are not valid integer constants:

ii. 4.0 - This is a floating point constant, not an integer. It has a decimal point.

iii. 4.3 - This is also a floating point constant because of the decimal point.

iv. "four" - This is a string constant, not an integer. It's made up of characters, not digits.