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JavaScript - Math.sqrt() method example
16 points
Math sqrt is a static method that returns a number which is the square root of an input value. The method works only on positive real numbers.
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console.log( Math.sqrt( 4 ) ); // 22
console.log( Math.sqrt( 9 ) ); // 33
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console.log( Math.sqrt( 2 ) ); // 1.41421356237309515
console.log( Math.sqrt( 0.5 ) ); // 0.70710678118654766
console.log( Math.sqrt( 0 ) ); // 07
console.log( Math.sqrt( -1 ) ); // NaN| Syntax | Math.sqrt(number) |
| Parameters | number - integer or float number value in the range 0 to +Infinity (primitive value). |
| Result |
Square root If the operation can not be executed |
| Description | sqrt is a static method that returns a number which is the square root of the input value. The method works only on positive real numbers. |
In this example, the way how to calculate square root using the power function is presented.
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function calculateSqrt(value) {2
return Math.pow(value, 0.5);3
}4
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// Usage examples:7
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console.log( calculateSqrt( 4 ) ); // 29
console.log( calculateSqrt( 9 ) ); // 310
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console.log( calculateSqrt( 2 ) ); // 1.414213562373095112
console.log( calculateSqrt( 0.5 ) ); // 0.707106781186547613
console.log( calculateSqrt( 0 ) ); // 014
console.log( calculateSqrt( -1 ) ); // NaN