Find largest number

Write a program that repeatedly reads in integers from input until a negative integer is read. You should not prompt for these numbers; we'll assume the user knows what to do$.$

The program must also keep track of the largest integer that has been read so far and outputs the largest integer at the end.

The output message should be as follows:

The largest number was: largest number $\}$

the output is:

The largest number was: $77$

You can assume a user will enter at least one positive integer or the number zero before a negative integer.