Unable to install express and hence it is showing errors what should I do about it

input:
const express=require(‘express’)

console.log(typeof express)

output:

Error: Cannot find module ‘express’
Require stack:

  • /Users/deeptisharma/Desktop/fresh/file1.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:966:15)
    at Function.Module._load (internal/modules/cjs/loader.js:842:27)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object. (/Users/deeptisharma/Desktop/fresh/file1.js:1:15)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)
    at Object.Module._extensions…js (internal/modules/cjs/loader.js:1158:10)
    at Module.load (internal/modules/cjs/loader.js:986:32)
    at Function.Module._load (internal/modules/cjs/loader.js:879:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12) {
    code: ‘MODULE_NOT_FOUND’,
    requireStack: [ ‘/Users/deeptisharma/Desktop/fresh/file1.js’ ]
    }

You need to perform
npm init
npm install express