CODEWITHSUNDEEP
javaloopsnested
JSox
JSox

Reputation: 25

Can somebody explain this nested loop?

I have the solution to the code, but I don't understand how it works. Can somebody explain?

   for (int i = 1; i <= 3; i++)
      for (int j = i; j <= 4; j++)
          System.out.print(j + " ");

The output for the code is 1 2 3 4 2 3 4 3 4

Upvotes: 0

Views: 87

Answers (2)

N.Jordan
N.Jordan

Reputation: 25

At the beginning I is at 1 so j goes to 1 to 4 right

Than I pass to 2 so j goes to 2 to 4 cuz I=j remember

Than I pass to 3 so j goes to 3 to 4 and voila

You get: 1234 234 34...

Upvotes: 0

OneCricketeer
OneCricketeer

Reputation: 191701

j starts at i=1 and goes to 4.

i increments.

j starts at i=2 and goes to 4.

Rinse, repeat...

Maybe this visual helps delineate the loops 

1 2 3 4 | 2 3 4 | 3 4

Upvotes: 1

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