sed any number code example

Example 1: sed replace number

Just use one of following commands for replacing a number of:
sed "s/[0-9]//" f.txt	#One single digit as 1
sed "s/[0-9]\+//" f.txt #Further digits as 837, specifying match repetition "\+"
sed "s/[0-9]\+\.[0-9]\+]//" file.txt #Float type with decimals

Example 2: js reverse number

const reversedNum = num => parseFloat(num.toString().split('').reverse().join('')) * Math.sign(num)