float celsius;

void setup() {
    Serial.begin(9600);
    Serial.println("Enter temperature in Celsius:");
}

void loop() {
    if (Serial.available() > 0) {
        String input = Serial.readStringUntil('\n');
        celsius = input.toFloat();
        float fahrenheit = (celsius * 9.0 / 5.0) + 32.0;

        Serial.print("Temperature in Celsius: ");
        Serial.print(celsius);
        Serial.println(" °C");

        Serial.print("Temperature in Fahrenheit: ");25
        Serial.print(fahrenheit);
        Serial.println(" °F");

        Serial.println();

        Serial.println("Enter temperature in Celsius:");
    }
}