If you multiply a number with itself, you get the square of that number, but sometimes you want to do the reverse and get the square root of a number. So to find what number has been multiplied with itself to get any given

positivevalue we use this function. For example:sqrt(9)will return 3 since 3*3=9.

sqrt(val);

参数 | 描述 |
---|---|

val | The number to get the square root of. |

实数

num = sqrt(exp);

The above code will set the variable "num" to hold the square root of the value contained in "exp".