JSFiddle - React, Tailwind, and code Playground

CSS

#sum_table {
 white-space: nowrap;   
}
#sum_table td {
 padding: 5px 10px;   
}

JavaScript

var json = {"student":{
    "0":[{
        "name":"manet",
        "marks":114
    }],
    "1":null,
    "2":null,
    "3":null,
    "4":null,
    "5":null,
    "6":null,
    "7":null,
    "8":null,
    "9":null,
    "10":null,
    "18":[{
        "name":"Om",
        "marks":75
    }]
}
}
alert("JSON Marks "+ json["student"]["0"]["0"]["marks"]) ;