What does /= mean in C#?

Question

I am having a tough time googling /=... can anyone tell me what this code does?

number = digits[n % digits.Length] + number;
n /= digits.Length;

My intent is to determine what the remainder of this operation is... so I know when to stop or keep going.

http://en.wikibooks.org/wiki/C_Sharp_Programming/Operators#Short-hand_Assignment — photoionized, May 14 '11 at 00:29
Thanks for all the help. I can accept an answer in 11 minutes.. — makerofthings7, May 14 '11 at 00:30

score 5 · Accepted Answer · answered May 14 '11 at 00:27

5

This is the division assignment operator operator meaning n = n/digits.Length

See MSDN: /= Operator (C# Reference) for details.

answered May 14 '11 at 00:27

YetAnotherUser

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score 4 · Answer 2 · answered May 14 '11 at 00:33

4

Just to add to what has already been posted in various answers, a compound assignment operator $= (replace $ with a binary operator) is similar to an assignment with the binary operator used in the right-hand side. The difference is that the left-hand side is evaluated only once. So:

x $= y

x is evaluated only once.

x = x $ y

x is evaluated twice.

Unlikely to make a difference in practice.

answered May 14 '11 at 00:33

Nathan Ryan

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If you say: `DoHeavyWorkCauseSideEffectsAndReturnObject().MyIntProperty /= 100;`, then it might make a difference compared to `DoHeavyWorkCauseSideEffectsAndReturnObject().MyIntProperty = DoHeavyWorkCauseSideEffectsAndReturnObject().MyIntProperty / 100;`. But most of the time you split it into two statements, and so you're right, there's no practical difference. – Jeppe Stig Nielsen Nov 10 '12 at 13:32

score 1 · Answer 3 · answered May 14 '11 at 00:28

1

x /= y means set x equal to (in this case the integral part of) 'x divided by y'. / is the division operator.

answered May 14 '11 at 00:28

Will A

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score 0 · Answer 4 · answered May 14 '11 at 00:27

0

Same as

n += 4; // adds 4
n *= 4; // 4 times

just division.

answered May 14 '11 at 00:27

Aykut Çevik

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score 0 · Answer 5 · answered May 14 '11 at 00:28

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Per MSDN, these two are equivalent:

 n /= digits.Length;

and

 n = n/digits.Length;

Similar to the more commonly seen:

n+=1;

answered May 14 '11 at 00:28

brendan

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score 0 · Answer 6 · answered May 14 '11 at 00:29

0

/= is a division operator.

x /= y ;

is the same thing as saying:

x = x / y ;

answered May 14 '11 at 00:29

Nicholas Carey

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What does /= mean in C#?

6 Answers6

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