How to read all analog sensors on arduino

//This code will help you to read all analog sensors on every microprocessors.
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this is the code to do it :
int analogpin = A0;
int readings;
int readingsInPercentages;
void setup(){
Serial.begin(9600);
pinMode(analogpin, INPUT);
}
void loop(){
readings = analogRead(analogpin);
readingsInPercentages = map(readings, 0, 1024, 100, 0);
Serial.print("the percentage reading is ");
Serial.println(readingsInPercentages);
Serial.print(" %");
}
IN THE COMMENT BELLOW I NEED TO KNOW WHAT WOULD HAPPEN IF WE HAD PUT float analogpin = A0; instead of int analogpin = A0;