What do << and >> mean in c++

The << and >> operators in C: <<: Left shift operator, left shift by the specified number of digits, which is equivalent to multiplying by the power of 2;>> : Right shift operator, shifts the specified number of digits to the right, which is equivalent to dividing by the power of 2, discarding the decimal part.

##<< and >> operators in C

Question: What do the << and >> operators in C mean?

Answer:

<< Operator: left shift operator

Moves a number to Shift left by the specified number of places.
Every time you shift one position to the left, the number will be multiplied by 2.

>> Operator: Right shift operator

Moves a number to the right by the specified number of digits.
• Every time you shift one position to the right, the number will be divided by 2 and the decimal part will be discarded.

Purpose of bit shift operator

• Left shift operator (<<):Used for fast multiplication In powers of 2.
• Right shift operator (>>): For quick division by a power of 2.
• Extract binary bit fields: Through right shift and masking operations, specific bit fields of binary numbers can be easily extracted.

Example:

int x = 10;  // 十进制 10

// 左移 3 位（乘以 8）
int y = x << 3;  // 结果：80

// 右移 2 位（除以 4）
int z = x >> 2;  // 结果：2

Note:

The left shift operator can only be used Integer type.
• The right shift operator can be used for integer and unsigned integer types.
• For signed integers, the behavior of the right shift operator depends on the compiler and platform.

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