static ip for esp8266?

#include <ESP8266WiFi.h>
String ssid = "ssid";
String password = "password";
void setup() {
  IPAddress ip(192, 168, 1, 17);
  IPAddress subnet(255, 255, 255, 0);
  IPAddress gt(192, 168, 1, 1);
  Serial.begin(115200);
  char charBuf[50];
  char charBuf2[50];
  ssid.toCharArray(charBuf, 50);
  password.toCharArray(charBuf2, 50);
  WiFi.config(ip, gt, subnet);
  WiFi.begin(charBuf , charBuf2);

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {
  // put your main code here, to run repeatedly:

}