ICSE − Q & A

for reversing a String, can we use the .reverse(); function or do we have to do it using the for loop?

What is the uses of Wrapper class?

Is it compulsory to use scanner class cuz our school said no to buffer clss

+ 1 more questions by tirth7683  

What is a semantic error
asked by Tubhyam Mehta (tirth7683) 5 years ago
2

This is for those struggling for Math.rint(), hope this helps..



How Math.rint() works:

EVEN NUMBER CASES:
(1) Math.rint(4.4) = 4.0		
[This is basically just like math.round it will round to lowest]

(2) Math.rint(4.5) = 4.0		
[Since, the number main decimal number (4) is an even number, instead of rounding of to higher number like 5.0 from decimal point 0.5 it will round of to 4.0, unlike .round function] [For such no. if u want to round it to 5.0, the decimal shud be 0.6 or greater, like the case below] 

ODD NUMBER CASES:
(3) Math.rint(4.6/4.7 or greater) = 5.0


Now for the bottom 3 examples, the main decimal number (3) is an odd no, so it will obey standard rules of rounding, i.e. rounding will start from the 0.5 itself]  Exactly like Math.round() function.. except round returns int type..

(4) Math.rint(3.4) = 3.0 

(5) Math.rint(3.5) = 4.0

(6) Math.rint(3.6/3.7 or greater) = 4.0




*Negative numbers are the same.. just ignore the minus sign and follow above procedure, then put the minus sign back in the answer

Difference between boxing and unboxing???? 
(Not given in my textbook at all)

Bros why does a pure function need to return a value compulsorily?
I can just have a pure function to print the values too na? 😎😈

As i am a lot much helpful so here i go

Super 100 program question may come from here in boards and it is available on res paper practice hard

https://www.respaper.com/ved0_ssk_respaper_pongala/9522-pdf.html

Question in the response below ⬇

https://www.respaper.com/aryanjain200376/5965-zip.html Q3 d 9 (ii)

THROWS keyword only declares that such an exception occurs but doesnot handle it right