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how to use the structure 'for' ?

–1 vote
asked Dec 31, 2020 by Bechair Hechlef (130 points)

1 Answer

+3 votes
answered Jan 4 by Peter Minarik (15,580 points)

for is a keyword and the usage changes slightly from language to language. In C/C++ it has the following syntax:

for ([INITIALISATION]; [CONDITION]; [INCREMENT]) [INSTRUCTION]

where

  • INITIALISATION is typically setting up the start conditions of the for loop.
  • CONDITION is typically a logical expression to check whether the for loop should keep running (exit when it fails).
  • INCREMENT is typically an instruction to increment a loop variable for the next iteration of the loop
  • INSTRUCTION is the body of the loop to execute in every iteration
an actual example would be like this:
for (int i = 1; i <= 10; i++)
{
    printf("The %dth square number is: %d\n", i, i * i);
}
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