Loops in C || C Tutorials
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Loops in C

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In C Programming Language, a Loop is used to execute a block of a statement repeatedly.


Types of Loops in C Programming Language:

  1. While Loop
  2. Do While Loop
  3. For Loop

1 do while loop

The do while loop in C Language checks the condition at the base of the loop. It executes the loop inside the body once at-least for one time.

Syntax:

do {
statement (s);
} while(condition);

Example:

#include <stdio.h>
int main () {
int a = 10;
d {
    printf('value of a: %d\n', a);
    a = a + 1;
    } while( a < 20 );
 return 0;
}
Output:

value of a: 10

value of a: 11

value of a: 12

value of a: 13

value of a: 14

value of a: 15

value of a: 16

value of a: 17

value of a: 18

value of a: 19


2 while loop

The while loop in C Programming Language repeatedly executes the statement until the given condition is true.

Syntax:

while  (Condition test)
{
// Statements to be executed repeatedly
// Increment (++) or Decrement ( - - ) operation
}

Example:

#include <stdio.h>
int main ()
{
int count = 1;
while (count <= 4)
{
printf("%d ", count);
count++;
}
return 0;
}
Output:

1 2 3 4


3 for While Loop

The syntax of for While Loop in C Programing Language:

for (initialization; condition test; increment or decrement)
{
/ / Statements to be executed repeatedly
}

Example of For Loop

#include <stdio.h>
int main()
{
int i;
for (i=1; i<=3; i++)
{
printf("%d\n", i);
}
return 0;
}
Output:

1

2

3




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