Count Multiples of 3 in a Range

Read two integers a and b (with a <= b) from standard input and print how many numbers in the range a to b (inclusive) are divisible by 3, with no trailing newline. For example, for the input 1 10 the multiples are 3, 6, and 9, so print:

3

Loop from a to b and count the values where i % 3 == 0.

Expected Output:

Topics:

Loops

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