Escape Sequences & Format Specifiers

When using printf() in C, you'll often see things like \n, %d, and %f.

They may look confusing at first, but they're actually pretty simple. Escape sequences control how text is displayed, while format specifiers tell C what type of value we're working with.

Escape Sequences

An escape sequence is a combination of characters beginning with a backslash (\) that represents a special character or action.

For example:

printf("Hello\nWorld");

Output:

Hello
World

Here, \n means new line.

Common Escape Sequences

For example:

printf("Name:\tJohn\nAge:\t20");

Output:

Name:   John
Age:    20

Format Specifiers

A format specifier is a special symbol used with functions like printf() and scanf() to indicate the type of data being displayed or read.

For example:

int age = 20;

printf("Age = %d", age);

Here, %d tells printf() that age is an integer.

Common Format Specifiers

For example:

int age = 20;
float height = 5.8;
char grade = 'A';

printf("Age: %d\n", age);
printf("Height: %f\n", height);
printf("Grade: %c\n", grade);

Output:

Age: 20
Height: 5.800000
Grade: A

Escape Sequence vs Format Specifier

These two are easy to confuse, so remember the difference:

Simple Example

int age = 20;

printf("Hello\nAge = %d", age);

Here:

• \n → moves to a new line

• %d → displays the integer age

Output:

Hello
Age = 20

In Simple Words

Escape sequences control how text is displayed, while format specifiers tell C what type of data to read or display.

The easiest way to remember them is:

\ → Special character/action

% → Data format