In Bash, you should do your check in an arithmetic context: if (( a > b )); then … fi For POSIX shells that don’t support (()), you can use -lt and -gt. if [ “$a” -gt “$b” ]; then … fi You can get a full list of comparison operators with help test or … Read more
If you want to evaluate a string expression use the below code snippet. using System.Data; DataTable dt = new DataTable(); var v = dt.Compute(“3 * (2+4)”,””);
How can I check if a string is a valid number?
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How to check if a String is numeric in Java
BigInteger has the divideAndRemainder(…) method, one that returns a BigInteger array, the first item the division result, and the second, the remainder (which is what mod really does in Java). Update Including comment by Mark Dickinson to other answer: There’s a much simpler linear-time algorithm: set acc to 0, then for each digit d in … Read more