Why using strconv instead of fmt for converting typical data types to string

Why using strconv instead of fmt for converting typical data types to string

alot of us use fmt.Sprint to convert basic data types to string, but it causes performance degradation especially if you are building a CLI utility

fmt.Sprint Causes Heap Escapes

here is a code sample from go tour (i did make changes to it) that checks if X is lower than 0 , if true it formates it as a complex number formula (x + yi)

then x goes to math.Sqrt() function to square root