import React, { Component } from 'react'
   class Ravi extends React.Component{
    constructor(){
    super()
     this.state={

    data: 0
    }
    }
    inc(){
     this.setState({
        data: this.state.data +1  
     })}
     render(){
       return(
        <div>
       {this.state.data}
      <button onClick={()=>this.inc()}> Button</button>
        </div>
       )
       }
       }
       export default Ravi;