Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| City | State or Territory | Station call sign | Network | Channel number | Programs Aired |
| --- | --- | --- | --- | --- | --- |
| Chicago | Illinois | WBBM-TV | CBS | 2.0 | Juke Box Jury Sheriff of Cochise |
| Los Angeles | California | KRCA-TV (now KNBC-TV ) | NBC | 4.0 | Grand Jury |
| New York City | New York | WABC-TV | ABC | 7.0 | U.S. Marshal |
| New York City | New York | WCBS-TV | CBS | 2.0 | Man Without a Gun |
| New York City | New York | WNBC-TV | NBC | 4.0 | Grand Jury The Third Man |
Question:
What is the highest channel number?
Answer:
7.0