+ 5

# I'm not quite understand, why the result is 23 not 25. Is the parenthesis here should be ignored?

var a=10; var k; a++; k=(a++)+(a++); document.write(k);

12th Mar 2017, 2:10 PM
Debi Subekti
8 Antworten
+ 3
11+12=23
12th Mar 2017, 2:53 PM
Meharban Singh
+ 2
it first assign the value then increment value. i.e. first a=10 then a becomes 11 on a++ then k =(a++) here 11 is assign to a then a is increment by 1 i.e a=12 now. then (a++) here 12 is assign to a. so the final answer is k = 11+12 =23
12th Mar 2017, 2:24 PM
Mayur Chaudhari
+ 2
thanks all for the explanations I got it, here my understanding var a=10; // a = 10 var k; a++; // a = a + 1 , this is mean a now 11 k=(a++)+(a++); // k=(a=a+1)+(a=a+1) here the challenge, i explain it below document.write(k); ------ k=(a=a+1)+(a=a+1) first, k=a which is a from previous value and before increased (a still 11), so k = 11 second, still in the first (a=a+1), a then increased by 1, so a become 12 third, a after become 12 is assigned to a in the second (a=a+1) fourth, now the equation become k=11+12 a then incremented by 1 in the second (a=a+1) but not include in k equation, because a value used in a++ is the a before incremented. clear. Oh ya, the final a value is 13. but not included in the k equation. Like i said before, the last a used for k equation is 12 (before incremented). and my hunch is right. the parenthesis are not needed.
12th Mar 2017, 3:07 PM
Debi Subekti
+ 1
jika mencoba ini hasilnya sama saja 23 var a=10; var k; a++; k=(a++)+a; document.write(k);
12th Mar 2017, 2:19 PM
AryaJ
0
postincrement
12th Mar 2017, 2:15 PM
Ihor
0
pertama tama nilai a = 10 lalu a++ menjadi 11 lalu ditambahkan lagi (a++) nilanya berubah menjadi 12 tapi hanya satu saja kesimpulan : k=12+11 k=23
12th Mar 2017, 2:22 PM
AryaJ
0
if you want the output is 25 try this : var a=10; var k; a++; k=(a++)+(a+=2); document.write(k);
12th Mar 2017, 2:30 PM
AryaJ
0
just easy as pie {a=10} a equals 11 then k =11 {k=a++} now a=12 but k still 11 {a++} now a=13 but k still 11 {k=a+++a++} now a=13 but k=11+12=13
13th Mar 2017, 8:16 AM
xarvis