Which bitwise operator is used to check if a bit is set to 1?&|~^

The bitwise operator used to check if a bit is set to 1 is the AND operator (&).

Here's how you can do it step by step:

1. Identify the bit you want to check. Let's say you want to check the nth bit of a number.

2. Create a mask that has the nth bit set to 1. You can do this by shifting 1 to the left n times. In most programming languages, this is done using the left shift operator (<<). For example, to create a mask for the 3rd bit, you would do: mask = 1 << 3.

3. Use the bitwise AND operator (&) to compare the number and the mask. If the result is not zero, then the nth bit of the number is set to 1. If the result is zero, then the nth bit is not set.

Here's an example in Python:

def is_bit_set(number, n):
    mask = 1 << n
    return (number & mask) != 0

In this function, number is the number you want to check, and n is the position of the bit you want to check (starting from 0 for the least significant bit). The function returns True if the nth bit is set to 1, and False otherwise.