Usage of << and >> in c language

In C language, << and >> are bit shift operators, used to perform bit operations on integer variables: <<: left shift operator, which represents the operand in binary Moves the specified number of bits to the left, equivalent to a power of 2. >>: Right shift operator, which moves the binary representation of the operand to the right by a specified number of digits, which is equivalent to division by a power of 2. Signed right shift (>>) preserves the sign bit, while unsigned right shift (>>>) fills empty bits with zeros.

##Usage of << and >> operators in C language

In C language , << and >> are displacement operators, used to perform displacement operations on integer variables.

Left shift operator (<<)##<< The operator shifts the binary representation of the operand to the left by the specified number of digits, which is equivalent to 2 is the base exponentiation operation. For example:

int x = 5; // 二进制表示：00000000 00000101
int y = x << 2; // y 的二进制表示：00000000 00010100
// 等价于：y = x * 2^2 = 5 * 4 = 20

right shift operator (>>)

operator shifts the binary representation of the operand to the right by the specified number of digits, which is equivalent to For base 2 division. It can also be divided into signed right shift (>>) and unsigned right shift (>>>).

##Signed right shift (>>):

will retain the sign bit of the operand and fill the left sign bit into the vacated bit. For example:

• int x = -5; // 二进制表示：11111111 11111011
  int y = x >> 2; // y 的二进制表示：11111111 11111100
  // 等价于：y = x / 2^2 = -5 / 4 = -2

Unsigned right shift (>>>):

will fill the vacated bits with 0, and the sign bit will not be retained. For example:

• int x = 5; // 二进制表示：00000000 00000101
  int y = x >>> 2; // y 的二进制表示：00000000 00000001
  // 等价于：y = x / 2^2 = 5 / 4 = 1

Application scenarios

The bit shift operator has a wide range of application scenarios, including:

Bit field operation

Data Compression
• Encryption and Decryption
• Performance Optimization

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