What does real mean in c language

real is the data type used to represent double-precision floating point numbers in C language. It occupies 8 bytes, has a precision of about 15 decimal places, and the range is [-1.7976931348623157e 308, 1.7976931348623157e 308].

real in C language

What is real?

real is the data type used to represent floating-point numbers in C language. It is a double-precision floating-point number.

Features:

• Occupies 8 bytes of space.
• You can have a decimal part after the decimal point.
• The precision is approximately 15 decimal places.
• The range is approximately [-1.7976931348623157e 308, 1.7976931348623157e 308].

Declaration:

<code class="c">float variable_name;
double variable_name;</code>

• float will declare the variable as a single-precision floating point number, occupying 4 bytes of space, and the precision is approximately 6 decimal places.
• double declares the variable as a double-precision floating point number, that is, real.

Example:

<code class="c">int main() {
  real x = 3.14159265;  // 声明一个 real 类型变量并初始化为 π
  printf("%f\n", x);  // 输出 x 的值

  return 0;
}</code>

Output:

<code>3.141593</code>

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