String-Formatting

Better than using quotes and plus symbol each time, which produces a new string every time a plus symbol is used.

    int nephew1Age = 9;
    int nephew2Age = 12;
    int nephew3Age = 14;

    System.out.printf("The ages of my nephew's are %d, %d, %d%n", nephew1Age, nephew2Age, nephew3Age);

Decimal formatting.

double pi = Math.PI;
System.out.printf("Pi value in 3 decimal places is %.3f",pi);

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