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Output (print and printf)

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• The print function
  • To print an item:

    print ( One-String );

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• String concatenation
  • The string concatenation operator:

    . = (pure) string concatenation

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  • Promoting to string:

    When string concatenation . operates on non-string typed values, the value is first converted to string

    Example:

    <?php $a = 1; $x = $a + 1; # Add print("x = " . $x . "\n"); $x = $a . 1; # String concatenate ! print("x = " . $x . "\n"); $x = 1 . 1; # String concatenate ! print("x = " . $x . "\n"); ?>

    Output:

    x = 2 x = 11 x = 11

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  • Example Program: (Demo above code)                                                
    • Prog file: click here

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• printf( ): C style formatted print function
  • For those who know C programming, PHP also has a printf( ) function that works like the one in C.

    Example:

    $x = 4; printf("x = %d\n", $x);

    If you don't know C, just use print( ) and use . (concatenate) to print longer strings.