What does %4d mean in C language?

c language %4d What does it mean?

%4d means to output a 4-digit long integer character. %4d is a format character in C language and is used to output decimal integers. %md, m is the width of the specified output field.

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%d, output according to the actual length of integer data. %ld, output long integer data.

Extended information

1. The o format character outputs integers in octal integer format.

2. x format character, output integer in hexadecimal format.

3. The u format character is used to output unsigned data, that is, unsigned numbers, output in decimal form.

4. The c format character is used to output a character.

5. s format character, used to output a string.

6. The f format character is used to output real numbers (including single and double precision) in decimal form.

7. The e format character outputs real numbers in exponential form.

8. The g format character is used to output real numbers. It automatically selects f format or e format according to the size of the value (the selected output is the one with a smaller width), and does not output meaningless zeros. .

9. p format character, used for output of variable address.

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