Number 2/3
Rounding of Numbers
Rounding is one of the most frequent operations on the numbers. JavaScript provides several built-in functions for rounding which are given in the below table.
| Function | Description | Example |
|---|---|---|
Math.floor() | Rounds off to the lower limit | 3.1 becomes 3, and -1.1 becomes -2. |
Math.ceil() | Rounds off the number to the upper limit | 3.1 becomes 4, and -1.1 becomes -1. |
Math.round() | Rounds off the nearest integer when value is equal or greater than .5 | 3.1 becomes 3, 3.6 becomes 4, and 3.5 rounds up to 4 (the middle case) |
Swipe to start coding
A variable named price with the assigned value of 4.7 has been given to you. Your task is to round off this variable such that we get 4 as the output.
Solução
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Can you explain the difference between Math.floor(), Math.ceil(), and Math.round() with more examples?
How do these rounding functions handle negative numbers?
Are there any other rounding methods in JavaScript I should know about?
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Rounding of Numbers
Rounding is one of the most frequent operations on the numbers. JavaScript provides several built-in functions for rounding which are given in the below table.
| Function | Description | Example |
|---|---|---|
Math.floor() | Rounds off to the lower limit | 3.1 becomes 3, and -1.1 becomes -2. |
Math.ceil() | Rounds off the number to the upper limit | 3.1 becomes 4, and -1.1 becomes -1. |
Math.round() | Rounds off the nearest integer when value is equal or greater than .5 | 3.1 becomes 3, 3.6 becomes 4, and 3.5 rounds up to 4 (the middle case) |
Swipe to start coding
A variable named price with the assigned value of 4.7 has been given to you. Your task is to round off this variable such that we get 4 as the output.
Solução
Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixoObrigado pelo seu feedback!
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