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How do nested for loops execute in PHP?

How do nested for loops execute in PHP? (Computer science one · Nested Loops) — "Recall that you can write loops within loops. The inner loop will execute full…

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Bucles anidados: un bucle dentro de otro
El bucle interior se ejecuta completamente durante cada iteración del bucle exterior.
PHP incluye un ejemplo de dos bucles for anidados en el Código de muestra 39.7.
El bucle exterior usa n = 10 y el interior usa m = 20.
El bucle interior recorre j = 0, 1, 2, …, 19 y realiza 20 iteraciones.
El bucle exterior recorre i = 0, 1, 2, …, 9 y realiza 10 iteraciones.
La instrucción printf() se ejecuta 10 × 20 = 200 veces.
El programa imprime las parejas desde (0, 0) hasta (9, 19), siguiendo el orden de los bucles.

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How do nested for loops execute in PHP?

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Computer science one

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"Recall that you can write loops within loops. The inner loop will execute fully for each iteration of the outer loop. An example of two nested loops in PHP can be found in Code Sample 39.7.\n\n$n = 10;\n\n$m = 20;\n\nfor($i=0; $i<$n; $i++) {\n\nfor($j=0; $j<$m; $j++) {\n\nprintf(\"(i, j) = (%d, %d)\n\n\", $i, $j);\n\n}\n\n}\n\nCode Sample 39.7.: Nested For Loops in PHP\n\nThe inner loop executes for j = 0, 1, 2, . . . , 19 < m = 20 for a total of 20 iterations. However, it executes 20 times for each iteration of the outer loop. Since the outer loop executes for i = 0, 1, 2, . . . , 9 < n = 10, the total number of times the printf() statement executes is 10 × 20 = 200. In this example, the sequence (0, 0), (0, 1), (0, 2), . . . , (0, 19), (1, 0), . . . , (9, 19) will be printed."

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