Storefront API - How do I get all articles??

Shopify Plus
,
1

I’m new to Shopify’s Storefront API, and I’m trying to get all articles from a specific blog. Every query to the Storefront API that I’ve ever seen has the ‘first: x’ argument. My question is - in the code below, on the fifth line, what can I replace ‘first: 20’ with in order to return all of the articles for this blog, regardless of how many there are?

query getBlogByHandle($handle: String!) {
    blog(handle: $handle) {
        id
        title
        articles(first: 20) {
            edges {
                node {
                    image { url }
                    title
                    content
                    publishedAt
                    onlineStoreUrl
                    tags
                }
            }
        }
    }
}`