The for: Pascal Starter Cycle

The basis of programming is loops, for example, for. Pascal. Like any computer language, it also contains such constructs in its syntax.

Assignment of cyclic operators

– . , . , – , .

Pascal :

• for – ;
• while – ;
• repeat ... until – .

, . . for .

, :

FOR {a} := {b} TO {c} DO {d}.

, . . :

• {a} – , INTEGER;
• {b}, {c} – , , {a};
• {d} – / , .

for, Pascal {b}, {a} := {c}, :

• {b} <= {c}, ;
• {d};
• {a} , {a} := {a} + 1.

for , .

, for, , , «».

• s := 0;
• for a := 1 to 5 do
• begin
• s := s + a;
• end;
• writeln(s);

, :

• 1- : a = 1; s = 1;
• 2- : a = 2; s = 3;
• 3- : a = 3; s = 6;
• 4- : a = 4; s = 10;
• 5- : a = 5; s = 15.

«15» – 1 5.

, 1 5 .

for, Pascal {a}, {b}, {c}. , . .

1. ( ) {a} .
2. {b} {c} . , , 0 p. for a := 0 to pi do. – trunc() round(). , – .
3. {b} < {c}, {d} .
4. {a} . , {a} <> {c}. : {a} for.
5. ( do) - , {a}. , .

« » : , . , 2–3 Tab.

. «» .

, f(x) = 3*x + 15, M [x₁; x₂], x₁ x₂ – . for. Pascal :

• for a := 1 to M do
• begin
• x:= x1+(x2–x1)*(a–1)/(M–1);
• f:= 3*x + 15;
• writeln (x, ‘ ’, f);
• end.

x , : x:= x1+(x2–x1)*(a–1)/(M–1).

, , for. Pascal , :

• FOR {a} := {b} TO {c} DO
• FOR {a1} := {b1} TO {c1} DO

, : . , .