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.