#Why one works and the other doesnt

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timber cedar
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Was curious to why doing x+=y works in this case and doing x = x + y doesnt, shouldnt they be the same

balmy garnetBOT
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timber cedar
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shouldnt they do the same

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even when i just put one = it keeps saying

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no statement

west citrus
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sum == sum + something

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you compare, not assign

timber cedar
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wdym

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even when I just put one equals

west citrus
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You used == instead of =

timber cedar
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same thing

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it says not a statement

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actually

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nvm i know why it happens

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which makes me ask the next question

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does x+=y

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convert x

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to whatever y is

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?

west citrus
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depends on what type is x and y

timber cedar
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if x is a integer

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and y is a double

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would x = y

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x+=y

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convert x to a double

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I know the other way around wouldnt work because u cant convert a double to a integer

west citrus
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x is casted to double, then x+y, then cast to integer

timber cedar
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ok ty

west citrus
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/run java ```java
int a = 5;
double b = 6.2;

    a += b;
    System.out.println(a);
tight forgeBOT
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Here is your java(15.0.2) output @west citrus

11
west citrus
timber cedar
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do these conversions happen anywhere else in java

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will it always try to convert integers to doubles to do a operation and then convert back

west citrus
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not always
it won't let you do this int a = 5.2;

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you will have to cast it explicitly

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consider also, that there are some rules of math in java exists

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like, if you do operations with integer and double, integer will be casted to double, and result will be in double

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if short and integer -> short will be casted to integer etc

timber cedar
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oh interesting

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I will give that a read

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tysm alexander

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helpful as always

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!

gritty stream
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alexander the goat