feat(mips.html.markdown): Added info for data section

mips.html.markdown

@@ -13,4 +13,24 @@ The MIPS (Microprocessor without Interlocked Pipeline Stages) Assembly language
 # Comments are denoted with a '#'
 
 # Everything that occurs after a '#' will be ignored by the assembler's lexer.
+
+# Programs typically contain a .data and .text sections
+
+.data # Section where data is stored in memory (allocated in RAM), similar to variables in higher level languages
+
+  # Declarations follow a ( label: .type value(s) ) form of declaration
+  hello_world .asciiz           "Hello World\n" # Declare a null terminated string
+  num1: .word 42                # Integers are referred to as words (32 bit value)
+  arr1: .word 1, 2, 3, 4, 5     # Array of words
+  arr2: .byte 'a', 'b'          # Array of chars (1 byte each)
+  buffer: .space 60             # Allocates space in the RAM (not cleared to 0)
+
+  # Datatype sizes
+  _byte: .byte 'a'              # 1 byte
+  _halfword: .half 53           # 2 bytes
+  _word: .word 3                # 4 bytes
+  _float: .float 3.14           # 4 bytes
+  _double: .double 7.0          # 8 bytes
+
+
 ```