C - Operators

Arithmethic Operators - Binary Operators

This operators need two elements to execute.

Arithmethic Operators - Unary Operators

This operators need only one element to execute.

• Unary increment operator x++   Equivalent to  x = x+1
• Unary decrement operator x--   Equivalent to  x = x-1

But both the increment and decrement operator can appear on either side of an expression:

Pre-incrementing

uint32_t x,y;
x = 5;
y = ++x;

result

y = 6, x =6

Here the variable x is first incremented and then evaluated.

Post-incrementing

uint32_t x,y;
x = 5;
y = x++;

result

y = 5, x =6

Here the variable x is first evaluated and then incremented, that's why the y variable has the initial value of x instead of the incremented one.