Set up error checking and messages in a function

Workflow 4 steps, run in order in one session. Every step was executed against the engine and the output below is what it produced.

Step 1

f[20]

Output

f[20]

Step 2

f[100]

Output

f[100]

Step 3

Messages[f]

Output

{}

Step 4

Quiet[f[100]]

Output

f[100]

Functions used