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Ch4 (loops (while(condition) { }, for(condition) { }, do { } while…
Ch4
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for loop
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how it works
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The initialization is executed once, before the loop is entered.
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nested loops
a loop inside another loop statement. When processing tables, nested loops occur naturally. An outer loop iterates over all rows of the table. An inner loop deals with the columns in the current row.
for tables, always put rows before columns
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