Go Input
Reading user input and data in Go programs
📥 What is Go Input?
Go input allows you to read data from users through the console. The fmt package provides Scan functions to capture user input and store it in variables for processing.
package main
import "fmt"
func main() {
var name string
fmt.Print("Enter your name: ")
fmt.Scan(&name)
fmt.Println("Hello", name)
}
Output:
Enter your name: Alice Hello Alice
Go Input Functions
fmt.Scan()
Reads input separated by spaces
var name string
fmt.Scan(&name)fmt.Scanln()
Reads input until newline
var age int
fmt.Scanln(&age)fmt.Scanf()
Formatted input with patterns
var name string
fmt.Scanf("%s", &name)Multiple Inputs
Read multiple values at once
var x, y int
fmt.Scan(&x, &y)🔹 Basic Input Example
Simple program to get user input:
package main
import "fmt"
func main() {
var name string
var age int
fmt.Print("Enter your name: ")
fmt.Scan(&name)
fmt.Print("Enter your age: ")
fmt.Scan(&age)
fmt.Printf("Hello %s, you are %d years old!\n", name, age)
}Output:
Enter your name: Bob Enter your age: 25 Hello Bob, you are 25 years old!
🔹 Multiple Input Values
Reading multiple values in one line:
package main
import "fmt"
func main() {
var x, y, z int
fmt.Print("Enter three numbers: ")
fmt.Scan(&x, &y, &z)
sum := x + y + z
fmt.Printf("Numbers: %d, %d, %d\n", x, y, z)
fmt.Printf("Sum: %d\n", sum)
}Output:
Enter three numbers: 10 20 30 Numbers: 10, 20, 30 Sum: 60
🔹 Different Data Types Input
Reading various data types:
package main
import "fmt"
func main() {
var name string
var age int
var height float64
var isStudent bool
fmt.Print("Enter name: ")
fmt.Scan(&name)
fmt.Print("Enter age: ")
fmt.Scan(&age)
fmt.Print("Enter height: ")
fmt.Scan(&height)
fmt.Print("Are you a student? (true/false): ")
fmt.Scan(&isStudent)
fmt.Printf("Name: %s\n", name)
fmt.Printf("Age: %d\n", age)
fmt.Printf("Height: %.1f\n", height)
fmt.Printf("Student: %t\n", isStudent)
}Output:
Enter name: Alice Enter age: 22 Enter height: 5.5 Are you a student? (true/false): true Name: Alice Age: 22 Height: 5.5 Student: true
🔹 Interactive Calculator
Simple calculator using input:
package main
import "fmt"
func main() {
var num1, num2 float64
var operator string
fmt.Print("Enter first number: ")
fmt.Scan(&num1)
fmt.Print("Enter operator (+, -, *, /): ")
fmt.Scan(&operator)
fmt.Print("Enter second number: ")
fmt.Scan(&num2)
switch operator {
case "+":
fmt.Printf("Result: %.2f\n", num1+num2)
case "-":
fmt.Printf("Result: %.2f\n", num1-num2)
case "*":
fmt.Printf("Result: %.2f\n", num1*num2)
case "/":
fmt.Printf("Result: %.2f\n", num1/num2)
default:
fmt.Println("Invalid operator")
}
}Output:
Enter first number: 15 Enter operator (+, -, *, /): * Enter second number: 3 Result: 45.00