using class in java
class Number { int number; // square numbers public boolean isSquare(){ double squareRoot = Math.sqrt(number); if(squareRoot == Math.floor(squareRoot)) { return true; } else { return false; } } // triangular numbers public boolean isTriangular(){ int x = 1; int triangularNumber = 1; while(triangularNumber < number){ x++; triangularNumber = triangularNumber + x; } if(triangularNumber == number){ return true; } else { return false; } } } // testing Number myNumber = new Number(); myNumber.number = 16; System.out.println(myNumber.isSquare());