Operators << and >>

[cft]

Hello,
I realy don't understand these operators << and >>

In this example what is the value of offset ? 10 right ?
What's the difference with offset++

#define ADC_BITS 10
#define ADC_COUNTS (1<<ADC_BITS)
offset = ADC_COUNTS>>1;

Thanks

[Kevin C]

Here is a simple way to think about it:
a << b multiplies value a by the number 2, b times

a >> b divides value a by the number 2, b times

so:
#define ADC_COUNTS (1<<10)
offset = ADC_COUNTS>>1;

means:
offset = (1<<10) >> 1;

means :
offset = (1*2*2*2*2*2*2*2*2*2*2) /2;

means:
offset = 512

512 is 1000000000 in binary , having exactly 9 zeroes

[cft]

Ok clear.
Manipulate decimals is easier to understand, for me at least.
thanks