If statement not working while pressing button in react native

I'm trying to make a phone game, where user guesses the number between 1 and 100. When a button is pressed if statement should run and do some changes. Nothing althought happens. Why if statement is not executed when button is pressed?

const buttonPressed = () => {

  if ({num} < {randomNum}){
    message = tooLow
    counter + 1

  }else if ({num} > {randomNum}){
    message = tooHigh
    counter + 1

  }else if ({num} == {randomNum}){
    counter + 1
    message= correct
    Alert.alert('You guessed the number in'+{counter}+'guesses')

  }
}
return (


    <View style={styles.container}>
      <View>{message}</View>
        <TextInput style={styles.textinput} keyboardType='numeric' 
        onChangeText= 
        {(num) => setNum(num)} value={num}/>
       <Button onPress={buttonPressed} title="Press me"/>
    </View>
  );
  }