Output

Two Families of Printing in Go

1. print() and println() → low-level, built-in functions (from the Go runtime, not fmt package).

2. fmt.Printf() and friends → from the fmt package, much more powerful and commonly used

print()

• Purpose: Print text or values in a basic way.
• No formatting: It just writes values as-is.
• No automatic newline: You control spacing manually.
• Arguments: Can take multiple arguments, prints them directly.
• Not recommended for production code (meant for quick debugging).

println()

• Same as print(), but automatically adds a newline (\n) at the end.
• Still no fancy formatting, just prints each argument separated by a space.

With multiple arguments:

println("Score:", 100)  // Score: 100 - Notice the space between arguments.

fmt.Printf()

• Comes from the fmt package.
• Formatted printing — you can control how values are shown.
• Requires format verbs (placeholders like %d, %s, %f) inside a string.
• No automatic newline — you must add \n if you want one.

Common verbs:

• %d → integer
• %s → string
• %f → floating point
• %t → boolean
• %v → value (automatic format)
• %T → type of value

fmt.Printf("Name: %s, Age: %d\n", "Alice", 25) // Name: Alice, Age: 25

Comparison of Outputs

Feature	print()	println()	fmt.Printf()
Package needed	No (built-in)	No (built-in)	Yes (import "fmt")
Auto newline	No	Yes	No (unless \n added)
Formatting control	No	No	Yes (format verbs)
Multiple arguments	Yes (no format)	Yes (space-separated)	Yes (matches placeholders)
Recommended for real apps	❌ Debug only	❌ Debug only	✅ Yes