What does 0x mean in c language

0x represents the prefix of hexadecimal number in C language. Hexadecimal numbers use the digits 0 to 9 and the letters A to F to represent values ​​10 to 15, represented by prefixing the number with "0x". Advantages include ease of reading and compactness. When used in C language, only uppercase letters A to F can be used, must start with the "0x" prefix, and cannot use spaces or other delimiters.

#What does 0x mean in C language?

0x is the prefix of a hexadecimal number in C language. Hexadecimal numbers are represented in base 16, using the numbers 0 to 9 and the letters A to F to represent values ​​10 to 15.

How to use hexadecimal numbers:

Hexadecimal numbers are represented by adding "0x" prefix in front of the number, for example:

• 0x1A is equal to decimal 26
• 0x3F is equal to decimal 63
• 0x99 is equal to decimal 153

Hexadecimal numbers in C Usage in the language:

Hexadecimal numbers are commonly used to represent color values, bit masks, storage addresses, etc. Here are some examples:

• Color constant: 0xFFFF00 for yellow
• Bitmask: 0x000F for extracting the lowest 4 bits
• Storage address: 0x10000 for memory An address in

Advantages:

The advantages of using hexadecimal numbers include:

• vs. binary numbers Easier to read and understand than
• More compact than decimal numbers because each hexadecimal digit represents a 4-digit binary number

Note:

You need to pay attention to the following points when using hexadecimal numbers in C language:

• Only uppercase letters A to F can be used to represent values ​​10 to 15
• Cannot use spaces or other delimiters
• Must start with "0x" prefix

The above is the detailed content of What does 0x mean in c language. For more information, please follow other related articles on the PHP Chinese website!