Doubt about using Printf in Java [duplicated]

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Doubt about using Printf in Java [duplicated]

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I am learning how to program, and I have an exercise that asks me the following. Basically I have to print on the screen this text below with printf but I do not even know where to start.

El valor de la variable casado es true El valor de la variable MAXIMO es 999999 El valor de la variable diasem es 1 El valor de la variable diaanual es 300 El valor de la variable miliseg es 1298332800000 El valor de la variable totalfactura es 10350,677734 El valor de la variable totalfactura en notación científica es 1.035068E+04 El valor de la variable poblacion es 6775235741 El valor de la variable sexo es M

I have been looking for information on the Internet about how to use the printf class but my programming level is so low that I do not understand the explanations either and I do not know how to do the exercise. Can someone explain to me what rules I have to follow to use printf to show what the exercise asks me to do on the screen? Thank you very much.

java

asked by Sergio 16.02.2018 в 19:37

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System.out.printf("Texto que deseas imprimir");

To print plain text. If you want to pass a variable and print it, I'll give you this example:

double n = 1.25036;
System.out.printf("%.3f %n", n);

Exit:

1,250

answered by 16.02.2018 в 20:27

score 0 · Answer 2

Further breaking down the answer given by @ walter-cordova, the function System.out.printf() is defined as follows System.out.printf(String format, Object...args) , that is, a function that receives as the first parameter the display format for stream of output and secondly the data corresponding to that format.

Practical example:

double x = 1.00001;
char y = 'A';
int z = 13;
String s = "Otro String";

System.out.printf("Esta es una salida con printf donde x: %.3f,%n //%n representa un salto de línea
    y: %c, z: %d",x,y,z);
System.ou.printf("Este es otro String s: %s",s);

Result:

Esta es una salida con printf donde x: 1.000, 
y: A, z: 13
Este es otro String s: Otro String

In summary, instead of concatenating data in a giant String, System.out.printf() allows you to format your output and assign the corresponding values to the selected "tokens" .

Important to remember that there are specific "tokens" for the format of each data type.

Visit this link link for a more technical explanation of how format works and to consult the table of flags and converters or "tokens" allowed.

Here link a similar example of digested that provided by @luis -fernando