Vòng lặp while

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Filip Schouwenaars

DataCamp Instructor

Vòng lặp while

while(condition) {
  expr
}

while(ctr <= 7) {
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Vòng lặp while

while(condition) {
  expr
}

while(ctr <= 7) {
  print(paste("ctr is set to", ctr))
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Vòng lặp while

while(condition) {
  expr
}

while(ctr <= 7) {
  print(paste("ctr is set to", ctr))
  ctr <- ctr + 1
}
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Vòng lặp while

while(condition) {
  expr
}

while(ctr <= 7) {
  print(paste("ctr is set to", ctr))
  ctr <- ctr + 1
}

"ctr is set to 1"
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Vòng lặp while

while(condition) {
  expr
}

while(ctr <= 7) {
  print(paste("ctr is set to", ctr))
  ctr <- ctr + 1
}

"ctr is set to 2"
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Vòng lặp while

while(condition) {
  expr
}

while(ctr <= 7) {
  print(paste("ctr is set to", ctr))
  ctr <- ctr + 1
}

"ctr is set to 7"
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Vòng lặp while

while(condition) {
  expr
}

while(ctr <= 7) {
  print(paste("ctr is set to", ctr))
  ctr <- ctr + 1
}
  • Không có kết quả in
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Vòng lặp while

ctr <- 1
while(ctr <= 7) {
  print(paste("ctr is set to", ctr))
  ctr <- ctr + 1
}

"ctr is set to 1"
"ctr is set to 2"
...
"ctr is set to 7"

ctr

8
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Vòng lặp while

ctr <- 1
while(ctr <= 7) {
  print(paste("ctr is set to", ctr))
  ctr <- ctr + 1
}
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Vòng lặp while vô hạn

ctr <- 1
while(ctr <= 7) {
  print(paste("ctr is set to", ctr))

}

"ctr is set to 1"
"ctr is set to 1"
"ctr is set to 1"
"ctr is set to 1"
"ctr is set to 1"
"ctr is set to 1"
"ctr is set to 1"
...
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Lệnh break

ctr <- 1
while(ctr <= 7) {
  if(ctr %% 5 == 0) {
    break
  }
  print(paste("ctr is set to", ctr))
  ctr <- ctr + 1
}

"ctr is set to 1"
"ctr is set to 2"
"ctr is set to 3"
"ctr is set to 4"
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