description

# tryParse method Null safety

num? tryParse (

1. String input

)

Parses a string containing a number literal into a number.

Like parse except that this function returns `null` for invalid inputs instead of throwing.

## Implementation

    static num? tryParse(String input) {
      String source = input.trim();
      // TODO(lrn): Optimize to detect format and result type in one check.
      return int.tryParse(source) ?? double.tryParse(source);
    }