How to express keeping three decimal places in C language

How to retain three decimal places in C language: use the printf() function; use the format specifier %.3f, where the number followed by . specifies the number of decimal places, and f represents a floating point number.

Representation method with three decimal places in C language

In C language, you can format it by Input/output function printf() to retain a specified number of decimal places after the decimal point. The specific method is as follows:

Use %.3f format specifier

%.3f format specifier is used to specify The format of decimals to print, where:

• . The number following specifies the number of digits after the decimal point.
• f represents a floating point number (decimal).

Example:

<code class="c">#include <stdio.h>

int main() {
  float number = 123.4567;

  printf("%.3f", number);  // 输出：123.457

  return 0;
}</code>

Example output:

<code>123.457</code>

Other notes

• If the actual number of digits after the decimal point is less than the specified number, it will be padded with 0s.
• If the actual number of digits after the decimal point is more than the specified number, the excess digits will be truncated.
• For negative numbers, the rules for retaining the decimal point are the same as for positive numbers.

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