For Loop in C

For Loop in C: Efficient Iteration for Precise Control

The for loop in C language is used to iterate the statements or a part of the program several times.

(toc)

For Loop in C

A for loop in C is a control flow statement used to execute a block of code repeatedly until a specified condition becomes false. It's a common and efficient way to iterate over a sequence of values.

Syntax:

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

• Initialization: This part is executed once before the loop starts. It's typically used to initialize a loop variable.
• Condition: This expression is evaluated before each iteration. If it's true, the loop body is executed. If it's false, the loop terminates.
• Increment/Decrement: This part is executed after each iteration. It's typically used to update the loop variable.

Example:

for (int i = 0; i < 5; i++) {
    printf("Hello, world!\n");
}

In this example:

• i = 0 initializes the loop variable i.
• i < 5 is the condition that checks if i is less than 5.
• i++ increments i after each iteration.

Common Uses:

• Iterating over arrays or strings.
• Counting or summing values.
• Generating sequences of numbers.
• Implementing algorithms like bubble sort or selection sort.

Nested For Loops:

You can use nested for loops to create more complex patterns or perform tasks that require multiple levels of iteration.

for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 4; j++) {
        printf("(%d, %d)\n", i, j);
    }
}

Key Points:

• The for loop is a control flow statement used for iteration.
• It has three parts: initialization, condition, and increment/decrement.
• The loop body is executed as long as the condition is true.
• Nested for loops can be used to create complex patterns.