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How to take user input in Golang
Gutha Vamsi KrishnaIn this shot, we will learn how to take user input in Golang.
Golang has a function called Scanln that is provided by the fmt package and used to take input from the user.
Syntax
- To take input from the same line, we will use the following syntax:
fmt.Scan(&variablename)
- To take input from a new line, we will use the following syntax:
fmt.Scanln(&variablename)
Where:
fmtis the package nameScanorScanlnis the function that takes input&variablenameis the reference to the variable where we need to store the user input
In the example below, we take the user’s age as input and display a simple statement. We can perform any operation on the user input, such as sending it to the server when the user submits their form.
Code
package main
//import fmt package
import(
"fmt"
)
//program execution starts here
func main(){
//Display what you want from user
fmt.Println("Enter your age: ")
//Declare variable to store input
var age int
//Take input from user
fmt.Scanln(&age)
//Display age with statement
fmt.Println("You are ",age," years old.")
}Enter the input below
Explanation
- Line 5: Import the
fmtpackage. - Line 9: The execution of program starts from the
main()function. - Line 12: Display a statement or question to the user for which we take input.
- Line 15: Declare a variable
ageof typeintto store the input. - Line 18: Take input from the user with the
Scanlnfunction and pass theagevariable as the parameter. When the user enters input, it will be stored in theagevariable. - Line 21: Print a statement.
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