JavaScript: Round a number to a specified amount of digits

JavaScript fundamental (ES6 Syntax): Exercise-152 with Solution

Write a JavaScript program to round a number to a specified amount of digits.

• Use Math.round() and template literals to round the number to the specified number of digits.
• Omit the second argument, decimals, to round to an integer.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const round = (n, decimals = 0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);

console.log(round(1.005, 2));
console.log(round(1.05, 2));
console.log(round(1.0005, 2));

Sample Output:

1.01
1.05
1

Pictorial Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-152-1 by w3resource (@w3resource) on CodePen.

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