Q1. But Confused

Q1. But Confused

#include<stdio.h>

recursion(int num)
{
    if(num > 100000)
    {
        return;
    }
    printf("%d+",num);
    recursion(num * 4);
}

int main()
{
    int n;
    scanf("%d",&n);
    recursion(n);
    return 0;
}