For 루프

for

for문

1 Bash

for (( i = 1; i < 4; i++ )); do
	echo "i = $i"
done
# i = 1
# i = 2
# i = 3

for i in $(seq 1 3); do
	echo "i = $i"
done

for i in `seq 1 3`; do
	echo "i = $i"
done

for i in {1..3}; do
	echo "i = $i"
done

i=1
while [ $i -lt 4 ]; do
	echo "i = $i"
	i=`expr $i + 1`
done

for i in 2 3 5; do
  echo "i = $i"
done
# i = 2
# i = 3
# i = 5

for i in {1..5..2}; do
   echo "i = $i"
done

2 C

for(int i=1; i<=10; i++) {
	sum += i;
}

3 CMD

(@echo off & for /L %i in (1,1,4) do echo i = %i) & echo on
REM i = 1
REM i = 2
REM i = 3
REM i = 4

4 Java

for(int i=1; i<=10; i++) {
	sum += i;
}

5 JavaScript

for(var i=1; i<=10; i++) {
	sum += i;
}

6 PHP

$sum = 0;
for($i=1; $i<=10; $i++) {
	$sum += $i;
}
echo $sum;

7 Python

sum = 0
for i in range(10):
	sum += i
print sum

8 Ruby

sum = 0
for i in 1..4
	sum += i
end
puts sum
# 10

sum = 0
for i in 1...5
	sum += i
end
puts sum
# 10

sum = 0
(1..4).each { |i| sum += i }
puts sum
# 10

sum = 0
(1..4).each do |i|
    sum += i
end
puts sum
# 10

sum = 0
[1, 2, 3, 4].each { |i| sum += i }
puts sum
# 10

9 Visual Basic

FOR I = 1 TO 10
	SUM = SUM + I
NEXT I

10 같이 보기

• while
• foreach
• Iterator 패턴
• 자바 키워드
• str_repeat

11 참고 자료

• http://eqcode.com/wiki/For