Source code in the pari/gp programming language

guess_the_number(N=10)={
	a=random(N);
	print("guess the number between 0 and "N);
	for(x=1,N,
		if(x>1,
			if(b>a,
				print("guess again lower")
			,
				print("guess again higher")
		);
		b=input();
		if(b==a,break())
	);
	print("You guessed it correctly")
};