Numbers

Properties & Methods (opens new window)

❗️Floating point numbers cannot represent all decimals precisely in binary. This can lead to unexpected results, such as 0.1 + 0.2 === 0.3 returning false .

Rounding

• .toFixed(digits) (opens new window)
  • formats a number using fixed-point.
  • parameter is optional
• Math.round() (opens new window) -> rounded to the nearest integer
• Math.ceil() (opens new window) -> will round the value up.
• Math.floor() (opens new window) -> will round the value down.
• Math.pow (opens new window)

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String to Number

• .parseInt() (opens new window)
  • Turns String to Integer - parseInt(„60SJKL68“) -> 60
• .parseFloat() (opens new window)
  • Turns String to Float
• a = a * 1;
• Number() (opens new window)

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Random

.Math.random() (opens new window)

returns a floating-point, pseudo-random number in the range 0 to less than 1

function random(min, max) {
    return Math.floor(Math.random() * (max + 1 - min)) + min;
}

or

random(min, max) => Math.floor(Math.random() * (max + 1 - min)) + min;

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Other Number-Methods (opens new window)

• Math.sqrt()
• Math.pow() (opens new window) -> returns the base to the exponent power
• Infinity, -Infinity