The largest number less than 100 is 99.
According to the provided reference, considering whole numbers, the numbers less than 100 are 0, 1, 2, 3, ..., 97, 98, and 99. Among these, 99 is the largest.
Therefore, the answer is 99.
The largest number less than 100 is 99.
According to the provided reference, considering whole numbers, the numbers less than 100 are 0, 1, 2, 3, ..., 97, 98, and 99. Among these, 99 is the largest.
Therefore, the answer is 99.