Inspectopedia 2025.2 Help

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, refer to Package fmt at go.dev.

Example:

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)

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

GoPrintFunctions
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Go | Probable bugs

Inspection ID: GoPrintFunctions

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection GoPrintFunctions

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

GoLand 2025.2, Qodana for Go 2025.2,

Can be installed with plugin:

Go, 252.26654.0

Last modified: 18 September 2025