java - how does pre - increments and post increments work? -

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suppose have initialised 2 variables this

int a=0; int b=0;

now if assign b value 

b=a++ + ++a + ++a;

now a=3 , b=5 shouldnt have been b=2 ? why b assigned value 5 ?

lets see:

  • a++ = 0, afterwards increased 1.

  • ++a = (the 1 a++ plus 1 preincreased) 2

  • ++a = (the 2 ++a above plus 1 preincreased) 3

in total: 0 + 2 + 3 = 5

this explains why three. in last step increased three.


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