statement.md

SEL Statements

Statement types

block statement

{
  x = 10; 
  x += 10; 
}

expression statement

x = 10; 

if statement

• if (condition) ... else if (condition) ... else ...
• condition is an expression with boolean result
• the statement can be a multi-statement block or a single statement
• else part is optional

if (2 > 1) x = 10; else x = -10;
int x=10; if(x>0) x+=10; else x-=10; return x;

while statement

• while(condition) ...
• condition is an expression with a boolean result
• the statement can be a multi-statement block or a single statement

int x = 0; while(x<10) x+=3; return x;

for statement

• for(initialization, condition, update) ...
• if cond is missing, it is always true.

for(;;) {} is an infinite loop 
for(x=0; x<10; x+=1) x+=1; return x;

break statement

• break will exit the for/while loop

for(x=0; x<10; x+=1) break; return x;

continue statement

• continue will skip the remaining statements in the same iteration

for(x=0; x<10; x+=1) {x+=10; continue; x+=10;} return x;

return statement

• return the result of the whole expression.

for(x=0; x<10; x+=1) {x+=10; return x; x+=10;}

throw statement

• throw an error in a string representation and return it.

throw "invalid variable value: " + x;