What does %.2f mean in C language?

In C language, %.2f is used to control the output format of floating point numbers, retaining two decimal places after the decimal point. The % in the format specifier indicates the beginning of the format specifier. . separates the integer and decimal parts, and 2 specifies The number of decimal places, f represents a floating point number.

The meaning of %.2f in C language

In C language, %.2f is a format string used to control the output format of floating point numbers:

• % means starting a format specifier.
• . is used to separate the integer part and the decimal part.
• 2 Specify two decimal places after the decimal point.
• f represents a floating point number.

Thus, %.2f tells the printf or scanf function to output or input a floating point number in format with two decimal places. Character.

Example:

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

int main() {
    float num = 3.141592;
    printf("浮点数为：%.2f\n", num);
    return 0;
}</code>

The above code will output:

<code>浮点数为：3.14</code>

because it formats the floating point number num to two digits Decimal output.

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