Remove the last number in a number in javascript

Question

I need to get a number, knock the last number off and then return it as a number

ie given the number 12345, return 1234

is this the best way to do it:

let x = 12345
const y = x.toString().split('').slice(0, -1).join('')
const newNum = Number(y)

also is there a way to not do the const newNum and then just convert it back to a number in the string above?

Answer 1

I need to get a number, knock the last number off and then return it as a number

ie given the number 12345, return 1234

is this the best way to do it:

let x = 12345
const y = x.toString().split('').slice(0, -1).join('')
const newNum = Number(y)

also is there a way to not do the const newNum and then just convert it back to a number in the string above?

Answer 2

I need to get a number, knock the last number off and then return it as a number

ie given the number 12345, return 1234

is this the best way to do it:

let x = 12345
const y = x.toString().split('').slice(0, -1).join('')
const newNum = Number(y)

also is there a way to not do the const newNum and then just convert it back to a number in the string above?

Answer 3

I need to get a number, knock the last number off and then return it as a number

ie given the number 12345, return 1234

is this the best way to do it:

let x = 12345
const y = x.toString().split('').slice(0, -1).join('')
const newNum = Number(y)

also is there a way to not do the const newNum and then just convert it back to a number in the string above?

Answer 4

I need to get a number, knock the last number off and then return it as a number

ie given the number 12345, return 1234

is this the best way to do it:

let x = 12345
const y = x.toString().split('').slice(0, -1).join('')
const newNum = Number(y)

also is there a way to not do the const newNum and then just convert it back to a number in the string above?

Answer 5

I need to get a number, knock the last number off and then return it as a number

ie given the number 12345, return 1234

is this the best way to do it:

let x = 12345
const y = x.toString().split('').slice(0, -1).join('')
const newNum = Number(y)

also is there a way to not do the const newNum and then just convert it back to a number in the string above?