Looping Statement in C

 Loops

 It helps to repeat a statement several times until the condition is satisfied.

Three types of Loops

•  for loop

•  while loop

•  do…while loop

for loop

 If you know exactly how many times you want to loop through a block of code, use the for loop instead of a while loop:

Syntax

for (initialization; condition; increment/decrement) {
  // code block to be executed
}

Statement 1 (initialization) is executed (one time) before the execution of the code block.

Statement 2 defines the condition for executing the code block.

Statement 3 (increment/decrement) is executed (every time) after the code block has been executed.

#include<stdio.h>

int main()

{

    int i;

    for(i=0; i<5; i++)

    printf("%d ",i);

   

    return 0;

}

while loop

The while loop loops through a block of code as long as a specified condition is true:

Syntax:

Initialization;

while (condition)

 {
  // code block to be executed

Increment/decrement;
}

#include<stdio.h>

int main()

{

    int i=0;

    while(i<10){

    printf("%d ", i);

    i++;    

    }

    return 0;

}

do…while loop

It is an exit check loop

We will get the output at least once, even if the condition is false.

Syntax

Initialization;

do 

{
  // code block to be executed

increment/decrement;
}
while (condition);

#include<stdio.h>

int main()

{

    int i=3;

    do{

//      i = 3;

        printf("%d ", i);

        i++;

    }while(i<5);

    return 0;

}

UNCONDITIONAL STATEMENTS:

Break -> It temporarily terminates the program.

Continue -> It skips the program.

#include<stdio.h>

int main()

{

    int i;

    for(i=1; i<10; i++){

   

   

    if(i==5)

    continue; //skips the value

   

    if(i==7)

     break; //terminates the program temproraily

     printf("%d ",i);}

    return 0;

}

Goto -> These serve as a loop. It is a jump statement also referred to as an unconditional jump statement. The goto statement can jump from anywhere to anywhere within the syntax.

#include<stdio.h>

int main()

{

    int i =0;

    don:

        printf("%d ",i);

        i++;

   

    if(i!=5)

    {goto don;  }

    return 0;

}