what is wrong in my program ?

Using Arduino Programming Questions
1

I have started learning simple electronics with Arduino and I have a simple project and that is my code I wanna to what is wring in it and how can I improve it ?

#include <Servo.h>

Servo myServo;

const int DCMotor = 10;
const int onOff = 11;
int switchState = 0;
int servoAngle = 0;


void setup() {

  myServo.attach(9);
  pinMode (DCMotor,OUTPUT);
  pinMode (onOff,INPUT);

 myServo.write (0); 
 digitalWrite (DCMotor,LOW);

 
 }

void loop() {
  
  switchState = digitalRead (onOff);
  
  if (switchState = HIGH ){ // If the fan is on 

    digitalWrite (DCMotor,HIGH);

    for (servoAngle = 0, servoAngle < 180, servoAngle++){
      myServo.write (servoAngle);
      delay (250);
    }
    if (servoAngle = 180){
      for (servoAngle = 180, servo > 0, servoAngle -1){
      myServo.write (servoAngle);
      delay (250);
      }
    }
  }

  if (switchState = LOW){ // If  the fan is Off

  digitalWrite (DCMotor,LOW);
    
  }

}
2 
    for (servoAngle = 0, servoAngle < 180, servoAngle++){

The parts of a for-loop statement need to be separated by semicolons, not commas.

for (servoAngle = 180; servo > 0; servoAngle -1){

And that one has typos even after the commas are fixed. "servo" doesn't exist, and "servoAngle -1" doesn't do anything useful.

3

westfw:
The parts of a for-loop statement need to be separated by semicolons, not commas.
And that one has typos even after the commas are fixed. "servo" doesn't exist, and "servoAngle -1" doesn't do anything useful.

thanks