c

1 languages different  of generation  of computer
2 development of c (history and introduction)
3 Features of “C” Language
  robust language
 highly Portable 

1.  compiler-execute all  souse code and   created object code. it is very fast eg: c, java 
2. interpreter-execute line by line souse code and created object code. it is very slow eg: java script
3. linker- linking with all fills in the programmer

c token-individual  smallest units. 6 token.
key words-received word  by compiler.
constant- not changing value in execution
const  int x=45;

variables - changing value in execution
int x=23;
datatype- 5 fundamental data type

1. char
2. int 
3. double
4.  float
5. void

 sign qualifier=-128 to 127

 unsigned qualifier=o to 255