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for , while, do-while

Iterative(repeatedly) Control Instruction:- It is used to execute a code, multiple times.It is also of 3 types.

  1. for loop
  2. while loop
  3. do-while loop
1) for loop-
   syntax : for keyword(initialization,condition,increment/decrement)
              {
               //body
               }
example:
Explanation:- 1) go to main
2)declare x 
3) x initialize to 1, check condition 1<4 correct, print hello then x is increment x++ i.e x become 2 check condition again 2<4 correct print again hello then again increment x=3 , check 3<4 print again hello now 3 hello is print again increment now x become 4 check 4<4 no condition false exit for loop.

2) while loop:
   syntax:- while keyword(condition)
                 {  ---;  increment/decrement  }
example:
Explanation:- 1) go to main

2)declare x and initialize to 1
3) check condition 1<4 correct, print hello then x is increment x++ i.e x become 2 check condition again 2<4 correct print again hello then again increment x=3 , check 3<4 print again hello now 3 hello is print again increment now x become 4 check 4<4 no condition false exit for loop.

3)do while:- It is different from for and while loop, in both the loop first condition is check then statement is print, but in do while before condition a statement can be print.
while is terminate here by ;(semicolon) 
syntax:- do{
               ----;
               }
              while(condition);
example:-
 Explanation:- 1) go to main


2)declare x and initialize to 1
3) go to do then directly print hello increment x by 1 now x=2, go to while loop check condition 2<4 true now go to do body print hello  and so on.

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