What does x*x mean in C language?

In C language, x*x represents the result of multiplying x by itself, that is, the square of x. It corresponds to x² in mathematics and takes precedence over addition and subtraction operations. Useful for calculating area, volume and solving quadratic equations, but be aware that floating point precision may cause slight deviations.

##x*x means in C language

In C language,

x*x represents the result of x multiplied by itself, which is the square of x. It corresponds to x² in mathematics.

Operator precedence

* (multiplication) operator has higher precedence than (addition) and - (subtraction) operator. Therefore, x*x is executed before the addition and subtraction operations.

Example

The following code snippet calculates and prints the square of

5:

#include <stdio.h>

int main()
{
    int x = 5;
    int square = x * x;

    printf("5 的平方为：%d\n", square);

    return 0;
}

Output:

<code>5 的平方为：25</code>

Other uses

x*x The operation can also be used for:

Calculate the area (for a square or circle)
Calculate volume (for cube or sphere)
• Solve quadratic equation

Notes

When

x## When # is a floating point number, the result of x*x may deviate slightly from the exact value due to the limited precision of floating point numbers.

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