When learning to program, it is important that one practice what they’ve learned and what they’re currently learning, as many programming concepts lay a foundation for other concepts that you’ll learn later. A FizzBuzz program is one type of programming exercise that one can do in order to re-enforce concepts that were learned early on in their programming education.
A FizzBuzz program should:
- Print the numbers 1 – 100
- If a number is divisible by 3, the program should print the word “Fizz”
- If a number is divisible by 5, the program should print the word “Buzz”
- If a number is divisible by both 3 and 5, it should print the word “FizzBuzz”
Here’s an example of one possible solution to the FizzBuzz program, written in Java, as well as explanations as to what the code does and why it is used.
class FizzBuzz{
public static void main (String[] args){
//Use a "for loop" to print the numbers 1 - 100 to the screen/console,
//as we know how many numbers will be printed at runtime.
for(int i = 1; i <= 100; i++){
//Check to see if a number is divisible by 3 and 5, which is done
//first because checking for divisibility for either 3 or 5 first
//would cause either "Fizz" or "Buzz" to be printed instead
if(i % 3 == 0 && i % 5 == 0){
System.out.println("FizzBuzz");
}
//Check for divisibility by 3 and print "Fizz" if true
else if(i % 3 == 0){
System.out.println("Fizz");
}
//Check for divisibility by 5 and print "Buzz" if true
else if(i % 5 == 0){
System.out.println("Buzz");
}
//If a number is not divisible by 3 or 5, print it normally
else{
System.out.println(i);
}
}
}
}
The resulting output from this code would be:
1 2 Fizz 4 Buzz Fizz 7 8 Fizz Buzz 11 Fizz 13 14 FizzBuzz 16 17 Fizz 19 Buzz Fizz 22 23 Fizz Buzz 26 Fizz 28 29 FizzBuzz 31 32 Fizz 34 Buzz Fizz 37 38 Fizz Buzz 41 Fizz 43 44 FizzBuzz 46 47 Fizz 49 Buzz Fizz 52 53 Fizz Buzz 56 Fizz 58 59 FizzBuzz 61 62 Fizz 64 Buzz Fizz 67 68 Fizz Buzz 71 Fizz 73 74 FizzBuzz 76 77 Fizz 79 Buzz Fizz 82 83 Fizz Buzz 86 Fizz 88 89 FizzBuzz 91 92 Fizz 94 Buzz Fizz 97 98 Fizz Buzz
Another way to check for divisibility by both 3 and 5, which would print “FizzBuzz”, one could instead check to see if a number is divisible by 15, the least common multiple of 3 and 5, which would result in the same output. Here’s what this would look like in Java code:
if(i % 15 == 0){
System.out.println("FizzBuzz");
}
There you have it! That’s how to go about creating a “FizzBuzz” program in Java! Feel free to copy and paste the code written above into your IDE or editor of choice and play around with it, in order to what changing various lines of code could do! You could even include other checks, perhaps printing something else if a number is divisible by other numbers!
Please feel free to let me know what you think of this post in the comments or by sending me an e-mail using the Contact page, or on Twitter – @Jamiemcg! If you liked this post, I invite you to check out the TechnicalCafe YouTube channel, where you can find more tutorials on Java, HTML, CSS, and more!
TechnicalCafe.com 