Why in java you have to give a space input btw int input and Line input?

Question

when we have to take input from scanner , than we have to take a blank input BTW an Int input and Line input. I want to know why we have to add that blank input?
for example:
Scanner input = new Scanner(System.in);
int a;
String name;
a = input.nextInt();

input.nextLine();

name =input.nextLine();

So ,why we need that
input.nextLine();
BTW the input of a and name.

Answer 1

In Sololearn,the input box says "Separate multiple inputs by multiple lines". Hence users write there next input (in example, its name) in next line.

So if we dont use input.nextLine(); then the name will get null value(as there is no value after user's first input (in example its a))

Answer 2

but it is not applicable only on sololearn