printf Statements for Fancier Printing
If you want more precise control over the output format than
print gives you, use printf. With printf you can
specify the width to use for each item, and you can specify various
formatting choices for numbers (such as what radix to use, whether to
print an exponent, whether to print a sign, and how many digits to print
after the decimal point). You do this by supplying a string, called
the format string, which controls how and where to print the other
arguments.
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