What does += mean in java code?

Question

I would search, but no search engine will read symbols apparently.

For instance:

int sum = 0;

for ( int i = 0; i < ROWS; i++ )
for ( int j = 0; j < COLUMNS; j++ )
sum += a[i][j];

what does the += mean when it says sum += ...etc?

Thanks!

Answer 1

"sum += ... " is a shorthand notation in many programming languages that means the same as "sum = sum + ..." from your example.

Basically it add the right hand expression to the left hand variable.

There is also -= and in some languages even *= and /= that do basically the same, but with different operations.

Answer 2

(int first, int second) are the parameters for the gcd approach. they're used to outline parameters for the approach at the same time as it truly is called. the go back area only returns the parameters to the caller when they're set contained in the approach. it truly is a worry-free getter/setter approach for what i anticipate is a best common denominator calculation. You call the gcd approach, providing it the first and second numbers, and it returns the gcd.

Answer 3

It translates to:

sum = sum + a[i][j];

Answer 4

a += b

is the same as

a = a + b;

make sense?

Answer 5

I am a graphic designer not a coder

Answer 6

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