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hamdan hassan
Courses Plus Student 640 PointsCan Some one explain this to me
My question is not about this top I wrote this code and I was expecting the answer to be zero but instead I got six
int t,s=6; t=(8*s++)%7; System.out.println(t);
6 Answers
nissen
9,130 Points int t,s=6;
t=(8*s++)%7;
System.out.println(t);
// t = (8 * 6) % 7 = 6;
// t = (48) % 7 = 6;
s is incremented after the value was passed to the function calling it;
if you want to increment before, use ++s . And use parenthesis around ++s , just as preliminary
(pre/post -increment)
hamdan hassan
Courses Plus Student 640 PointsBut 8 * 6 = 48
nissen
9,130 PointsAnd 48%7 = 6.
hamdan hassan
Courses Plus Student 640 Pointsok thanks
hamdan hassan
Courses Plus Student 640 PointsOne last question.
for(int i=1;i<=5;i++) System.out.println(i);
1 2 3 4 5
should'n this also follow the post increament rule eg: when i = 1 and i++ then i = 1
when i = 2 and i++ then i = 2
nissen
9,130 PointsIt is a post increment. // i is incremented at the end of the loop
i = 1;
1 == i++ // true i = 1
1 == i // false i = 2
The for loop, it is divided into 3 parts. the initialization is done first and once only. int i=1;
then the condition is checked, i<=5; Then the program pointer or next execution is the inside of the loop. At the end of the loop, increment: i++
hamdan hassan
Courses Plus Student 640 PointsCan you explain to me what is a constructor and why do we need a constructor,I didn't understand it. Also why do we have to initialise our variable in the contructor and not in the class.Sorry I keep saying this is my last question
nissen
9,130 Pointsclasses are plans for building objects, and the constructor construct the object. In the C programming language which a lot of programming languages are based on, you have to manage memory yourself. Oop made a lot of things easier. if not specify, default constructor is used.
Because it keeps all initialization in one place. Look up java best practices