while / do..while / repeat..until

偽代碼

pseudo-code

 n =
while當{
　　　print(n)
　　　n = n+1
} 		n =
do執行{
　　　print(n)
　　　n = n+1
}while當 		n =
repeat重複{
　　　print(n)
　　　n = n+1
}until直至
Python 
n = 1
while n<10:
    print(n)
    n = n+1

n = 1
while True:
    print(n)
    n = n+1
    if n<10: continue
    else: break
 
n = 1
while True:
    print(n)
    n = n+1
    if n>=10: break
C Language

PHP

Javascript

 
n = 1;
while(n<10){
    printf("%i\n", n);
    echo n;
    n++;
}
 
n = 1;
do{
    printf("%i\n", n);
    echo n;
    n++;
}while(n<10);
 
n = 1;
while(1){
    printf("%i\n", n);
    echo n;
    n++;
    if(n>=10) break;
}
work 9-5 
dead = true/false
# pre-test 前測
while not dead{
    work 9-5
    dead = ...
}
 
dead = true/false

do{
    work 9-5
    dead = ...
}while not dead;
# post-test 後測
 
dead = true/false

repeat{
    work 9-5
    dead = ...
}until dead;
# post-test 後測