fmt

The fmt module provides Go-style formatted printing and string formatting.

Functions¶

Function	Returns	Description
`fmt.printf(format, *args)`	`None`	Print formatted output to stdout
`fmt.println(*args)`	`None`	Print arguments to stdout followed by a newline
`fmt.sprintf(format, *args)`	`string`	Return a formatted string

printf, println, and sprintf are also available as top-level global aliases (no fmt. prefix required).

Format strings use Go fmt verbs: %s (string), %d (integer), %f (float), %v (default), %q (quoted string), %% (literal percent), etc.

Examples¶

Formatted printing¶

fmt.printf("Hello, %s! You have %d messages.\n", "alice", 42)

String formatting¶

msg = fmt.sprintf("deploy %s to %s (replicas=%d)", "myapp", "prod", 3)
print(msg)

Format verbs¶

fmt.printf("string: %s\n", "hello")
fmt.printf("quoted: %q\n", "hello world")
fmt.printf("int:    %d\n", 42)
fmt.printf("float:  %.2f\n", 3.14159)
fmt.printf("value:  %v\n", [1, 2, 3])
fmt.printf("percent: 100%%\n")