class PrintChar{
  constructor(char,num){
    this.char = char;
    this.num = num;
  }

  for3(){
    for (let i =0; i<this.num ;i++){
      if (i%2==0) {

        let result = "";
        for(let j = this.num-1; j>i; j--){

          result += this.char;

        }
        console.log(result);
      }
    }
  }
}

var print = new PrintChar("C",11);

print.for3();