格式化数字

格式化数字

function formatNumber(num, digits) {

const si = [

{value:1E18, symbol:'E' },

    {value:1E15, symbol:'P' },

    {value:1E12, symbol:'T' },

    {value:1E9, symbol:'G' },

    {value:1E6, symbol:'M' },

    {value:1E3, symbol:'k' }

]

for (let i =0; i < si.length; i++) {

if (num >= si[i].value) {

return (num / si[i].value +0.1).toFixed(digits).replace(/\.0+$|(\.[0-9]*[1-9])0+$/, '$1') + si[i].symbol

    }

}

return num.toString()

}