React Native

import React, { useState } from 'react';
import { View, Text, TouchableOpacity, StyleSheet } from 'react-native';

export default function CounterApp() {
  const [count, setCount] = useState(0);

  return (
    <View style={styles.container}>
      <Text style={styles.title}>React Native Counter</Text>
      
      <View style={styles.counterBox}>
        <Text style={styles.countText}>{count}</Text>
      </View>
      
      <View style={styles.buttonRow}>
        <TouchableOpacity 
          style={styles.button}
          onPress={() => setCount(count - 1)}
        >
          <Text style={styles.buttonText}>-</Text>
        </TouchableOpacity>
        
        <TouchableOpacity 
          style={[styles.button, styles.resetButton]}
          onPress={() => setCount(0)}
        >
          <Text style={styles.buttonText}>Reset</Text>
        </TouchableOpacity>
        
        <TouchableOpacity 
          style={styles.button}
          onPress={() => setCount(count + 1)}
        >
          <Text style={styles.buttonText}>+</Text>
        </TouchableOpacity>
      </View>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#f5f5f5',
    alignItems: 'center',
    justifyContent: 'center',
  },
  title: {
    fontSize: 28,
    fontWeight: 'bold',
    marginBottom: 30,
  },
  counterBox: {
    backgroundColor: 'white',
    padding: 40,
    borderRadius: 20,
    marginBottom: 30,
  },
  countText: {
    fontSize: 60,
    fontWeight: 'bold',
    color: '#2563eb',
  },
  buttonRow: {
    flexDirection: 'row',
    gap: 15,
  },
  button: {
    backgroundColor: '#2563eb',
    paddingVertical: 15,
    paddingHorizontal: 30,
    borderRadius: 10,
  },
  resetButton: {
    backgroundColor: '#ef4444',
  },
  buttonText: {
    color: 'white',
    fontSize: 18,
    fontWeight: 'bold',
  },
});