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Intermediate Java Tutorial – 3 – Recursion
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31 responses to “Intermediate Java Tutorial – 3 – Recursion”
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Damn man, you explain everything so well and always fill in the questions I am thinking as I watch. Great vids!
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Great!
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Brilliant, great explanation.
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this is just f(n)=n*f(n-1)
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why didn't we use recursion in 1st method?
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yeah problem solved when you find the only "1"
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This is just great, thanks a lot man! This is literally the best and easiest explanation of stuff that people are cracking their heads on all over again with books that are explaining it in a far for dissicult manner.
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Great tutorial man, helped the lightbulb in my head finalllyyy spark. Very interesting concept, and very well explained by you. Have a good day!
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when I first looked at this video years ago when I was a beginner it was great made sense and explained it in details but looking back now with having more programming experience it was good to a certain point but this really is just a BASIC example of recursion,he could of explained it much better like how the return in each stack frame(activation record) works and how it interacts with the calling frame,so yeah very basic video this barely scratches the surface of recursion,if you want to really get a better understanding of recursion read books,forums and also there is much better videos on youtube if you look hard enough explaining recursion and how it works in detail.
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if I'm calculating the value of fact(200) output is zero..
even after using long(32bit)
little help plz -
if we use int we get the same value. why are we using long?
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what kind of system could i make using recursion method? answer me please
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We can also,
public static int factorial(int num){
if(num <= 1) return 1;
return num * factorial(num-1);
}if the number is <=1 following code will not be executed as the return statement breaks out of the function.
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i wish you can explain to me how you know so much. were you born with this, like i am serious any suggestions with books to read ?
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you are the best, bucky!
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Great Job!
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why not this !!
public class hallo {
//main
public static void main(String [] args){
//Common
Scanner input = new Scanner (System.in);
System.out.println("enter you x");
int x;
x = input.nextInt();
factorial(x);
}
//x!
public static void factorial(int x){
int sum = 1;
for(int i=1;i<=x;i++){
sum*=i;
}
System.out.print(x+"! = "+sum);
}
} -
"Yeah, baby!"
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God bless you. University professors are absolutely useless
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You give the best explanations! Thank you so much for this video.
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Great Video!!!! Bucky you Rock!!!
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good explanation for an absolute beginner
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2009 video is on sleek!
here is my reformated code
thanks Bukky
import java.util.Scanner;
/**
*
* @author Christy
*/
public class Recursivity {public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Please input an integer to get a factoriel : ");
int num = input.nextInt();System.out.println("Factoriel of " + num + " is : " + fact(num));
}
public static long fact(long n){
// since 0 or 1 dfactorial the answer is alsways 0// So if you enter a number less than 1, return value to 1
if(n <=1)
return 1;
// Else return the value of n in the method time the
// factorial. Which is number minus 1
else
return n* fact(n-1);}
}
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Thank you Bucky! I viewed like 10 videos and couldn't figure it out. Your example at end made it finally click!
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what if instead of "fact(n-1)" on line 14, it was "fact(n+1)"? Would it b an infinite loop?
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Thanks a lot! Your tutorials are simply awesome
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Just read a whole chapter on Recursion from my course textbook and still could not grasp this. 8 minutes and you made this click.
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In this example, couldn't we just use a for loop?
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what ide is he using?
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Hi Bucky,
How can I store the result in a variable before returning it.If I try storing it in a variable, it shows 1 as the answer -
thank you so so much. i understood this better then my 1h class at school
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