printf() function in PHP

The printf() function output a formatted string. It returns the length of the outputted string.

Syntax

printf (format, argument1, argument2, ... )

Parameters

• format − Specifies the string and how to format the variables in it.

• The following are the possible format values −

  • %% - Returns a percent sign

  • %b - Binary number

  • %c - The character according to the ASCII value

  • %d - Signed decimal number (negative, zero or positive)

  • %e - Scientific notation using a lowercase (e.g. 1.2e+2)

  • %E - Scientific notation using a uppercase (e.g. 1.2E+2)

  • %u - Unsigned decimal number (equal to or greather than zero)

  • %f - Floating-point number (local settings aware)

  • %F - Floating-point number (not local settings aware)

  • %g - shorter of %e and %f

  • %G - shorter of %E and %f

  • %o - Octal number

  • %s - String

  • %x - Hexadecimal number (lowercase letters)

  • %X - Hexadecimal number (uppercase letters)

• argument1 − The argument to be inserted at the first %-sign in the format string.

• argument2 − The argument to be inserted at the second %-sign in the format string.

Return

The printf() function returns the length of the outputted string.

Example

The following is an example −

<?php
   $val = 2976;
   printf("%f",$val);
?>

Output

The following is the output −

2976.000000

Example

Let us see another example −

<?php
   $s = "Welcome";
   printf("[%s]<b>",$s);
?>

Output

The following is the output −

[Welcome]<br>