constants in react native

import React,{useState} from 'react';
import {View, Text,StyleSheet,Button} from 'react-native';
import Constants from 'expo-constants'
function App() {
const [name,setName]=useState("sagar")
return (
<View style={{paddingTop:Constants.statusBarHeight}}>
{
name ? <Text>name:{name} variable mein data hai</Text>:<Text>data nahi hai</Text>
}
<Button
title="save"
color="green"
onPress={()=>

setName("try")

}

/>
</View>
)

}
export default App;