c language(medium)

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Across
  1. 2. All keywords are in which letters?
  2. 3. Each block of a program is referred as?
  3. 6. "If" is format specifier of which datatype?
  4. 8. C programs are converted into machine language with the help of?
  5. 9. Which keyword is used to prevent changes in the variable?
Down
  1. 1. Which operator is used to compare two values?
  2. 4. Datatype used to store whole numbers
  3. 5. Void occupy how many bytes in memory?
  4. 7. C language was invented to develop which operating system?
  5. 9. getch() belongs to which header file?