[Grammar] to give but one example and for example

[mrmvp]

What is the difference between "to give but one example" and "for example."

I rarely see the expression "to give but one example."

Is it formal or informal?

 

[Raymott]

"For example" can be followed by multiple examples.
"To give but one example" sounds pretentious to me. It can be replaced with "to give one example".