This document discusses various programming concepts including data types, variables, logical and relational operators, if/else statements, switch statements, and functions. It defines char and int data types, and shows how to declare variables of different types. Logical and relational operators like >, <, ==, != are demonstrated. If/else and switch conditional statements are explained with examples showing how to execute different code blocks based on conditional logic. A function example is provided to calculate a bonus amount based on sum and preset bonus percentages.

2. identifier)
address)
1.1.
Char
-128

3. 1.2.
data_type
Var
Data
1.3.
var_type
Var name
Data

4. Boolean Logical Expression)
and or not
A = 1, B = 2, C = 3
and ((A > C) or (C > B))
+–*/
A != B)

5. price
price = cost + packing * 2 – discount;
cost = 100, packing = 10
discount = 5
packing
–
–
cost +
–
discount
price = 115

6. if
if
One Alternative)

7. Two Alternative)
Multiple-Alternative)
false
true
if

8. SWITCH
switch
switch
switch
if
switch
switch
switch
case
case
switch
case
statement
default
Variable
Constant
switch
int
statement
char

9. switch
#include <stdio.h>
main()
int ch; clrscr();
printf(" Menu n");
printf("===================n");
printf(" 1 :Create Data n");
printf(" 2 :Display Data n");
printf(" 3 :Append Data n");
printf(" 4 :Edit Data n");
printf(" 5 :Quit n");
printf("===================n");
printf("Please select <1, 2, 3, 4, 5 > ==> "); scanf("%d", & ch);
switch (ch)
{ case 1: printf("You take choice 1:Create Data n");
break;
case 2: printf("You take chaoice 2:Display Datan");
break;

10. case 3: printf("You take choice 3:Append Data n");
break;
case 4: printf("You take choice 4: Edit Data n");
break;
case 5: printf("You take choice 5:Quitn");
break;
default: printf("You take choice the other:default");
return(0);

11. ww
.
.

12. action)
1)
en)
name)
sum)
3)
4)
bonus)
sum >40,000
bonus
bonus=sum*20/100
bonus=sum*10/100