Nested Loops
Print a 2×3 grid of * using nested for loops
for(int i=0;i<2;i++){
for(int j=0;j<3;j++){
cout<<"*";
}
cout<<"\n";
}
Print numbers 1–5 but stop at 3 using break.
for(int i=1;i<=5;i++){
if(i==3) break;
cout<<i;
}
Write a switch that prints “Yes” for 1, “No” for 2, and “Maybe” for 3.
switch(n){
case 1: cout<<"Yes"; break;
case 2: cout<<"No"; break;
case 3: cout<<"Maybe"; break;
}
Predict output:
Write a function print1to5() that prints numbers 1–5.
void print1to5(){
for(int i=1;i<=5;i++) cout<<i<<"\n";
}
Write a nested loop to print:
1 2
3 4
int n=1;
for(int i=0;i<2;i++){
for(int j=0;j<2;j++){
cout<<n++<<" ";
}
cout<<"\n";
}
Print numbers 1–5 but skip 2 using continue.
for(int i=1;i<=5;i++){
if(i==2) continue;
cout<<i;
}
Predict output:
BC
Predict output:
}
0 1 2
Write a function sumRange(int a, int b) that returns the sum of all numbers between a and b inclusive.
int sumRange(int a,int b){
int sum=0;
for(int i=a;i<=b;i++) sum+=i;
return sum;
}
How many times does the inner loop execute?
for(int i=1;i<=3;i++){
for(int j=1;j<=i;j++){
cout<<i;
}
}
6
Explain in one sentence the difference between break and continue.
break exits the loop completely; continue skips the current iteration and continues with the next one.
A variable grade holds a character: 'A', 'B', 'C', 'D', or 'F'. Write a switch statement that prints "Pass" for 'A', 'B', or 'C', and "Fail" for 'D' or 'F'.
switch(grade){
case 'A': case 'B': case 'C': cout<<"Pass"; break;
case 'D': case 'F': cout<<"Fail"; break;
}
Predict output:
13
Write a function that prints numbers from 1 to n but skips multiples of 3 using continue.
void skip3(int n){
for(int i=1;i<=n;i++){
if(i%3==0) continue;
cout<<i<<"\n";
}
}