Hello everyone,

I would like to begin this by mentioning that I am learning Java through the app SoloLearn. I have understood most of what I have covered (which is the entire Basics section) but I did not understand something involving Prefix and Postfix Increment (+) operators.

 

I don't understand why in this example the result is 35

int x=34;

int y= ++x

 

but in this it is still 34.

int x=34;

int y= x++;

 

Can someone help me understand why this is? Thank you!

 

 

5 minutes ago, PixelToast said:

Hello everyone,

I would like to begin this by mentioning that I am learning Java through the app SoloLearn. I have understood most of what I have covered (which is the entire Basics section) but I did not understand something involving Prefix and Postfix Increment (+) operators.

 

I don't understand why in this example the result is 35

int x=34;

int y= ++x

 

but in this it is still 34.

int x=34;

int y= x++;

 

Can someone help me understand why this is? Thank you!

 

 

Because with prefix x is incremented first then the result is assigned to y

With postfix the value of x is assigned to y, then x is incremented

 

int y= ++x 

FIRST INCREMENT X THEN ASSIGN THE VALUE OF X TO Y:

x = x +1 // First increment x

int y = x; // Then assign the value of x to y

 

int y= x++

FIRST ASSIGN THE VALUE OF X TO Y THEN INCREMENT X:

int y = x; // First assign the value of x to y

x = x+1; // Then increment x