What is +=

Question

what is the meaning of +=

Answer 1

In C++, '+=' means '= + '
exemple :
i+=6; // i=i+6;

i+=1; // i=i+1; i++

If you don't understand ask !

Answer 2

same as (variable) = (variable) + (any number).

Answer 3

n = n + 1
or
n += 1

They are the exact same thing. People use "+=" because it is shorter.

Answer 4

thanks a lot

Answer 5

Code 101 but if we logically think how can n = n+1??

Answer 6

In C++, the '=' operator isn't the same as maths...
In maths, 5=4+1 is true.
In C++ we have to use '=='
In C++, we'll do 5==4+1; // return true
'=' MODIFY the value, '==' only "READ" the value

Answer 7

it's called a combinational assignment operator. It's used as a shortcut for Assigning the new value of a variable after an operation.
If a=6 b=4 c =2
a+=c //a= a + c
b-=a // b= b - a
b *=c // b= b * c
a/=c // a= a/c

Answer 8

People are always trying to code using less characters, so in several languages, including JavaScript and C++ you can use the operator than equals to perform that operation and store that as the new value for the variable.

a = 1;
b = 2;
c = 3;
d= 4;

a += b;

// now a = 3;

c %= a;

// now c = 0;

d *= b;

// now d = 8;

d /= a;

// d = 2 because C++ only takes the integer part of the result

// So now a = 3, b= 2, c= 0, and d = 2. You could imagine how useful these could be in simulations