What does %.4f mean in C language?

In C language, %.4f is a format string used to print floating point numbers, which specifies that 4 significant digits are retained after the decimal point.

In C language, what is %.4f?

In C language, %.4f is a format string used to print floating point numbers.

Detailed explanation:

• % symbol indicates that this is a formatted string. The
• . symbol indicates the position of the decimal point.
• 4 Specifies the number of significant digits left after the decimal point.
• f indicates that the format string is used to print floating point numbers.

Thus, the %.4f format string means to print a floating point number and format it to retain 4 significant digits after the decimal point.

Example:

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

int main() {
  float number = 123.4567;
  printf("浮点数：%.4f\n", number);

  return 0;
}</code>

Output:

<code>浮点数：123.4567</code>

In the above example, the %.4f format string is used Print the floating point number number and format it to retain 4 significant digits after the decimal point.

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