getStateLogic.js

const states = [
	{
		from: 1,
		to: 20,
		stateName: 'Andhra Pradesh'
	},
	{
		from: 21,
		to: 40,
		stateName: 'Arunachal Pradesh'
	},
	{
		from: 41,
		to: 60,
		stateName: 'Assam'
	},
	{
		from: 61,
		to: 80,
		stateName: 'Bihar'
	},
	{
		from: 81,
		to: 100,
		stateName: 'Chhattisgarh'
	},
	{
		from: 101,
		to: 120,
		stateName: 'Goa'
	},
	{
		from: 121,
		to: 140,
		stateName: 'Gujarat'
	},
	{
		from: 141,
		to: 160,
		stateName: 'Haryana'
	},
	{
		from: 161,
		to: 180,
		stateName: 'Himachal Pradesh'
	},
	{
		from: 181,
		to: 200,
		stateName: 'Jharkhand'
	},
	{
		from: 201,
		to: 220,
		stateName: 'Karnataka'
	},
	{
		from: 221,
		to: 240,
		stateName: 'Kerala'
	},
	{
		from: 241,
		to: 260,
		stateName: 'Madhya Pradesh'
	},
	{
		from: 261,
		to: 280,
		stateName: 'Maharashtra'
	},
	{
		from: 281,
		to: 300,
		stateName: 'Manipur'
	},
	{
		from: 301,
		to: 320,
		stateName: 'Meghalaya'
	},
	{
		from: 321,
		to: 340,
		stateName: 'Mizoram'
	},
	{
		from: 341,
		to: 360,
		stateName: 'Nagaland'
	},
	{
		from: 361,
		to: 380,
		stateName: 'Odisha'
	},
	{
		from: 381,
		to: 400,
		stateName: 'Punjab'
	},
	{
		from: 401,
		to: 420,
		stateName: 'Rajasthan'
	},
	{
		from: 421,
		to: 440,
		stateName: 'Sikkim'
	},
	{
		from: 441,
		to: 460,
		stateName: 'Tamil Nadu'
	},
	{
		from: 461,
		to: 480,
		stateName: 'Telangana'
	},
	{
		from: 481,
		to: 500,
		stateName: 'Tripura'
	},
	{
		from: 501,
		to: 520,
		stateName: 'Uttar Pradesh'
	},
	{
		from: 521,
		to: 540,
		stateName: 'Uttarakhand'
	},
	{
		from: 541,
		to: 560,
		stateName: 'West Bengal'
	},
	{
		from: 561,
		to: 580,
		stateName: 'Andaman and Nicobar Islands'
	},
	{
		from: 581,
		to: 600,
		stateName: 'Chandigarh'
	},
	{
		from: 601,
		to: 620,
		stateName: 'Dadra & Nagar Haveli and Daman & Diu'
	},
	{
		from: 621,
		to: 640,
		stateName: 'Delhi'
	},
	{
		from: 641,
		to: 660,
		stateName: 'Jammu and Kashmir'
	},
	{
		from: 661,
		to: 680,
		stateName: 'Lakshadweep'
	},
	{
		from: 681,
		to: 700,
		stateName: 'Puducherry'
	},
	{
		from: 701,
		to: 720,
		stateName: 'Ladakh'
	}
];

let userInput = 82;

let flag = null;
for (let currentState of states) {
	if (userInput >= currentState.from && userInput <= currentState.to) {
		flag = currentState.stateName;
		break;
	}
}

console.log(flag);