Which bitwise operator is suitable for checking whether a particular bit is ON or OFF?

to check if the ith bit is on or off in a number n following  bitwise operation is used.

flag = n&(1<<i) ;

if the value of flag is zero then the bit is set otherwise not.
explanation of above approach is as follows.

1. lets assume n is 9 so its bitwise operator is 1001 and bitwise representation of 1 is 0001

2.to check if 4th bit is on we do left shift by 4 on 1 (1<<4) which shift the bits in one to left by 4 unit now the (1<<4)=1000

3.Finally bitwise and operation is performed so  1001&1000 = 1000 which is not zero so it means that 4th bit of  9 is set

to check if the ith bit is on or off in a number n following  bitwise operation is used.

flag = n&(1<<i) ;

if the value of flag is zero then the bit is set otherwise not.
explanation of above approach is as follows.

1. lets assume n is 9 so its bitwise operator is 1001 and bitwise representation of 1 is 0001

2.to check if 4th bit is on we do left shift by 4 on 1 (1<<4) which shift the bits in one to left by 4 unit now the (1<<4)=1000

3.Finally bitwise and operation is performed so  1001&1000 = 1000 which is not zero so it means that 4th bit of  9 is set

Bitwise AND