isDecimal

isDecimal(X)

X is a STRING scalar or vector.

Return "true" if all characters in the string are numbers. For STRING type NULLs, return "false".

isDecimal("123456");
// output
true

isDecimal("1And1");
// output
false

isDecimal("10.05");
// output
false

isDecimal(string());
// output
false