Can anyone explain this code to me ----- a+=(a==number) ?

in C there are arithmetic operators and comparison operator. += is an arithmetic operator, x+=5 is the same as x= x+5, this is a legal statement because x+5 is evaluated first, then x+5 is reassigned to x, so if x is 6, x = x+5 will assign the value 11 to x. == is a comparison operator, comparison operators result in a value of 1 if the comparison succeeds or result in the value 0 if the comparison fails, but this result is not usually assigned this way by convention, but C allows it. You would normaly only store a success or failure in a seperate int or boolean variable or maybe even keep track of the number of successes or failures, but the convoluted expression in your example seems to have no purpose. your example of a+=(a==number) is just nerd geek stuff

If a equals number, a is assigned the value of a + 1 (increments the value of a with 1) It not, a is assigned the value of a + 0 (a remains the same value). It could be written like: a = a + (a == number); or even: if (a == number) a = a + 1; // alternatively a += 1 or a++; The latter is the least confusing perhaps. Another alternative could be to use a ternary a = a + (a == number ? 1 : 0);

If this is C or C++ than you are adding 1 to a assuming that a is equal to number and 0 if it's unequal. If this is Java than you're just going to get an error.

It could be written like: a = a + (a==number); reassigning the value of a