Break statement:
Hii hutumika pale ambapo unahitaji ku stop code zisiendelee ku excute yaani kufanya kazi kama sharti fulani litafikiwa. Kwa mfano kwneye ile tebo yetu ya saba tunaweza kukatisha katikati.
Mfano tunataka tebo yetu ya saba iishie kwenye 8 kisha iishie hapo. Kufanya hivi tutatumia break statement. Itatubidi tutumie if else ili kuweka shari. Kwa mujibu wa mano wetu itabidi tuangalie je imeshafka kwenye 8, kama tayari tutakwenda ku break.
if (x == 8) {
break;
}
void main() {
print('TEBO YA 7');
for (int x = 1; x <=12; x++){
print(7*x);
if (x == 8) {
break;
}
}
}
Sasa tukitaka kuendelea na na 9 yaani turuke 8 tuendelee kwenye 9, kufanya hivi tutatumia continue statement. Ila utofauti hapa utaanza na kutweka masharti kabla ya kuprint.
void main() {
print('TEBO YA 7');
for (int x = 1; x <=12; x++){
if (x == 8) {
continue;
}
print('${x}*7 = ${x *7}');
}
}
Utaona hapo 8*7 haipo kabisa. Kwa mfano tunaweza kuruka kutoka 5 hadi 8 kusha kuendelea na 9
void main() {
print('TEBO YA 7');
for (int x = 1; x <=12; x++){
if (x >=5 && x<=8) {
continue;
}
print('${x}*7 = ${x *7}');
}
}
Wacha tuchanganye operator nyingine. Sasa tunataka kuruka 3, 5, 6, 7 na 8.
void main() {
print('TEBO YA 7');
for (int x = 1; x <=12; x++){
if (x== 3 || x >=5 && x<=8) {
continue;
}
print('${x}*7 = ${x *7}');
}
}
Wacha sasa tuone namna ambavyo break na continue inaweza kufanya kazi kwenye while loop.
void main() {
print('TEBO YA 7');
var x = 0;
while(x <12){
x++;
print("${x}*7= ${x *7}");
if (x == 8) {
break;
}
}
}
void main() {
print('TEBO YA 7');
var x = 0;
while(x <12){
x++;
if (x == 8) {
continue;
}
print("${x}*7= ${x *7}");
}
}
Kwenye do while loop
void main() {
var x = 1;
print('TEBO YA 7');
do{
print("${x}*7= ${x *7}");
if (x == 8) {
break;
}
x++;
}while(x<=12);
}
void main()
{
int x = 0;
do {
x++;
if (x == 8) {
print("nane haipo");
continue;
}
print('${x}*7 = ${x *7}');
} while (x <= 12);
}
Mwisho:
Somo linalofuata tutakwend akujifunza jinsi ya kupata user input.
