for loop - test counter - why it is used less than

Question

I am confused about for loop, in "test counter" why it is used less than (jerry < tom.length)..?

public static void main (String args[]) {

int tom[] = {1, 2, 3, 4, 5};    

    for (int jerry=0; jerry<tom.length; jerry++)
    {
System.out.println(jerry+ "\t" +tom[jerry]);

} }

Not necessarily: [some people prefer `!=` for very good reasons](http://stackoverflow.com/questions/1783822/format-of-for-loops/8884617#8884617). — Sergey Kalinichenko, Aug 18 '13 at 15:47

score 0 · Answer 1 · answered Aug 18 '13 at 15:45

0

Arrays in java(c/c++/ruby etc) start indexing arrays from 0 not 1.
So that's why it starts as jerry=0(first index is 0) and end at length of your array - 1, which is the last index(in your example last index is 4)

answered Aug 18 '13 at 15:45

Darek Nędza

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can u clear me on this: lets see jerry value is 0 < tom.length value is 0, as arrays indexing start from 0, so this condition is true or false. if this condition is false the loop should not go further right? – user2694115 Aug 18 '13 at 18:45
If both jerry AND length of your array(tom.length) is 0 then this condition is false, so your for loop doesn't run. That what you asked? ps. in your case tom.length=5, not 0 – Darek Nędza Aug 18 '13 at 18:59

for loop - test counter - why it is used less than

1 Answers1