A program will not run if it has syntax errors. Any such errors must be fixed first. A good integrated development environment (IDE) will usually point out any syntax ...
Any one or more of these errors may exist in a program, and each will cause the program to crash or not run at all.
If your search query contains whitespace, you will need to surround it with quotation marks. For example: cats NOT "hello world" matches repositories with the word "cats" but not the words "hello ...