Output formatting basics in Go - Cheat Sheet & Quick Revision

Recall & Review

beginner

What package is commonly used in Go for formatted output?

The fmt package is used for formatted output in Go. It provides functions like Println, Printf, and Sprintf.

beginner

What does fmt.Printf("Hello, %s!", name) do?

It prints the string Hello, followed by the value of name, replacing %s with that string value.

beginner

Name two common format verbs used in Go's fmt.Printf.

Two common verbs are:<br>- %d for integers<br>- %f for floating-point numbers

intermediate

How do you print a floating-point number with 2 decimal places in Go?

Use %.2f in fmt.Printf. For example: fmt.Printf("%.2f", 3.14159) prints 3.14.

beginner

What is the difference between fmt.Println and fmt.Printf?

fmt.Println prints values with spaces and adds a newline automatically.<br>fmt.Printf prints formatted output according to a format string you provide.

Which fmt function allows you to format output with verbs like %d and %s?

A fmt.Scan

B fmt.Println

C fmt.Sprint

D fmt.Printf

fmt.Printf formats output using verbs like %d for integers and %s for strings.

What does the verb %s represent in Go's formatting?

A String

B Integer

C Floating-point number

D Boolean

%s is used to format string values.

How do you print a float with exactly 3 decimal places?

A %3f

B %.f3

C %.3f

D %f3

Use %.3f to format a float with 3 decimal places.

Which function automatically adds a newline after printing?

A fmt.Println

B fmt.Printf

C fmt.Print

D fmt.Sprintf

fmt.Println adds a newline after printing.

What will fmt.Printf("%d", 42) print?

A %d

B 42

C 42.0

D Error

%d formats the integer 42 as '42'.

Explain how to use fmt.Printf to format a string and an integer in one line.

Think about how to combine text and variables using format verbs.

Describe the difference between fmt.Println and fmt.Printf in Go.

One adds a newline automatically, the other needs a format string.