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Incorrect usage of 'fmt.Printf' and 'fmt.Println' functions

Reports incorrect usages of fmt.Printf, fmt.Println, and similar formatting and printing functions.

In their format strings, formatting functions use formatting verbs, like %s, %d, %v, and others. If formatting verbs are used incorrectly, the result of a formatting function will contain an error. For more information about formatting verbs, see Package fmt at


fmt.Printf("id: %s", 42)

The output of this function is id: %!s(int=42). It might be not what you really want. The following function uses the %d formatting verb. The output with the %d formatting verb will be id: 42.

fmt.Printf("id: %d", 42)

Inspection Details

Available in:

GoLand 2023.3



Last modified: 13 July 2023