public class Program { public static void main(String[] args) { int [ ] myArr = {6, 42, 3, 7}; int sum=0; for(int x=0; x<myArr.length; x++) { sum += myArr[x]; } System.out.println(sum); } }

Question

Can you people explain this program

Answer 1

in this program array concept has been used.
array will initialise like below mentioned
myArr[0]=6; myArr[1]=42;myArr[2]=3;myArr[3]=7;
myArr.length gives the length of the array which is 4.
for loop will be executed till x=3. when x exceeds 3 it'll be terminated.
when x=0,sum=6;x=1,sum=6+42=48;x=2,sum=48+3=51,x=3,sum=51+7=58.
now output will be displayed as 58

Answer 2

@Raymond: "x += y" is an alternative synthax for "x = x + y". Similarly, you have -=, *=, /=, etc.

Answer 3

58

Answer 4

This program sums the elements of the array MyArr and prints this sum. The output is 6 + 42 + 3 + 7 = 58.

Answer 5

thank you Murugavel Maheswaren, didn't quite understand this too and you just did justice to it. but please can you explain why we use '+=' rather than '+' in executing the for statement?

Answer 6

public class Cop

public static void main(String[] args) {

int mat[][]={{12,-23,45,-44),(13,-10,15,11));

int sum=0;

for(int i[]:mat)

for (int :1)

{

if(j<0)

continue;

sum+=j%2==0?0:1;

}

System.out.println(sum);

Answer 7

public class Cop

public static void main(String[] args) {

int mat[][]={{12,-23,45,-44),(13,-10,15,11));

int sum=0;

for(int i[]:mat)

for (int :1)

{

if(j<0)

continue;

sum+=j%2==0?0:1;

}

System.out.println(sum);