The difference between Give something a go and Have a go

When used as verbs, give something a go means to try or attempt, whereas have a go means to make an attempt.

check bellow for the other definitions of Give something a go and Have a go

Give something a go as a verb (idiomatic):

To try or attempt.

Examples:

"Why not give it a go? You may find it easier than you thought."

Have a go as a verb (intransitive, informal, UK):

To make an attempt; to try.

Examples:

"I've never tried karate before, but I'm willing to have a go."
Have a go as a verb (intransitive, informal, idiomatic, UK):

To attack (physically).

Examples:

"I heard you had a go at Jack the other night."

"Yes, we had a go."
Have a go as a verb (intransitive, informal, idiomatic, UK):

To tell off (especially unnecessarily or excessively), to criticise.

Examples:

"My teacher had a go at me earlier, just for missing one [[sodding]] homework. I was fuming."