vault backup: 2024-09-11 12:16:34
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@ -31,3 +31,12 @@ A variable must be declared before it is assigned.
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| --------- | ---------------------------------------------------------------------------------------------------------------------------------------- |
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| `%d` | Display an integer |
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| `%f` | Display a float. Specify the number of places to round to by adding a decimal and a number, eg `%.2f` would round to two decimal places. |
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For number formatting specifiers, the convention is as follows:
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`%-a.bX`
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`%`: Start of the formatting specifier
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`-`: (optional) If included, justify value left in space. Otherwise, justify right in space
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`a`: (optional) If included, the size of the field in characters.
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`.`: Separator between `a` and `b`. Optional if `b` is not specified
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`b`: The number of decimal places to round to
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`X`: The type of format to use, and the end of the specifier. Use `d` for integer base 10 (decimal) representation, `f` for fixed point decimal, and `e` for exponential notation
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# Standard library
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@ -8,12 +8,13 @@ d. `1e-06 `
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```c
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float x = 0.12345;
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// a
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printf("%-8.1f", x);
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printf("%-8.1e", x);
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// b
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printf("%10.6f", x);
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printf("%10.6e", x);
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// c
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printf("%8.3f", x);
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// d
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printf("%-6.0g", x);
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printf("%-6.0f", x);
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```
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c.
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# 3.
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