Depending on the size provided for storing an integer, there is a limit on the largest and smallest value determined by sizeof operator. No special symbols, commas. Double the amount of space is allocated for double precision number, mostly depends on the computer. And double precision numbers written in exponential form. Used to rept very large or very small numbers.
Single character is enclosed in single quotes eg.
Binary operators require 2 operands. Space between operands can be omitted. If any operand is a floating pt or double double precision. Sometimes unintuitive eg. See table 2-5 page 45.