Not able to enter input with String variable set to Scanner

[atac57]

I just wrote this to practice and for some reason when I run it it won't let me enter input on "answer = scan.nextLine();" after the second print statement. Appreciate the help.

import java.util.Scanner;

public class FirstProgram {
	
	public static void main(String args[]){
		
		Scanner scan = new Scanner(System.in);
		
		double balance, withdraw, deposit;
		String answer;
		
		System.out.println("What is your bank balance?");
		balance = scan.nextDouble();
		
		System.out.println("Would you like you make a withdraw, or a deposit?");
		answer = scan.nextLine();
		
		if(answer.equalsIgnoreCase("withdraw"))
		{
			System.out.println("How much would you like to withdraw?");
			withdraw = scan.nextDouble();
			
			balance = balance - withdraw;
			System.out.println("Your current balance is: " + balance);
				
		}
		else if (answer.equalsIgnoreCase("deposit"))
		{
			System.out.println("How much would you like to deposit?");
			deposit = scan.nextDouble();
			
			balance = balance + deposit;
			System.out.println("Your current balance is: " + balance);
			
		}
			
	}
}

[atac57]

Ok, it looks like .next() without the "Line" is what works, but I've never had that problem before, nextLine(), would always work. Can anyone explain that?