This document introduces different types of programming loops in C including for, while, do-while, and nested loops. It explains that loops repeat execution of statements and lists the components of a for loop as an initializer, condition, and increment. While and do-while loops are described as having only a condition that is tested before or after each iteration, respectively. Nesting of for loops is defined as having one for loop within another and an example is provided to print a triangle pattern using nested for loops.

1. Introduction of C
programming loops
DHANANJAY PATEL (17TMPA052)

2. Loops
 Loops statements are used to repeat the execution of statements.
 Types of loops :
• For loop
• While loop
• Do…..While loop
• Nesting for loop

3. For loop
 For loop has three parts:
• Initializer is executed at start of loop.
• O Loop condition is tested before iteration to decidewhether to continue or terminate the loop.
• O Increment is executed at the end of each loopiteration.
while(condition)
{
….
if(condition)
{
break;
}
…..
}

4. While Loop
 It has a loop condition only that is testedbefore each iteration to decide whether
tocontinue or terminate the loop.
 Syntex:
while(condition)
{
….
if(condition)
{
break;
}
…..
}

5. Do…While Loop
 Do while has a loop condition only that is tested aftereach iteration to
decide whether to continue with nextiteration or terminate the loop.
 Syntex:
do
{
…..
if(condition)
{
break;
}
…….
}
while(condition);

6. Nesting for Loop
 Nesting of for loops means for statement within another for statement.
 Two loops can be nested...
 Example :
for( i=1; i<=n; i++)
{
for(j=1; j<=i; j++)
{
printf(“*”);
}
printf(“n”);
}