I'm looking to design a tool where users can input odd numbers and generate diamond-shaped patterns using asterisks.
For example:
Enter an odd number: 5
*
***
*****
***
*
I'm looking to design a tool where users can input odd numbers and generate diamond-shaped patterns using asterisks.
For example:
Enter an odd number: 5
*
***
*****
***
*
If you have an input of 5, here's a simple way to learn how to count:
(spaces)(stars)
2 1
1 3
0 5
1 3
2 1
let input = 7; // Number( prompt("Enter any odd integer") );
let space = " ";
/*****/
let breakPoint = Math.floor(input / 2);
let str = "", iter = 0, i = 0;
while( iter < input ) {
str += (
space.repeat( (breakPoint - i) ) +
"*".repeat( 2 * i + 1 ) +
"<br>"
);
(iter < breakPoint) ? (i++) : (i--);
iter++;
}
document.body.innerHTML = str;body { font-family: 'Lucida Console'; } /* Monospaced font required */Instead of using two separate loops, you might find that one loop is actually simpler:
let input = 7;
let space = " ";
/***/
let breakPoint = Math.ceil(input / 2);
let str = "";
for( let i = 0; i < breakPoint - 1; i++ ) {
str += (
space.repeat( (breakPoint - i) ) +
"*".repeat( 2 * i + 1 ) +
"\n"
);
}
for( let i = breakPoint - 1; i >= 0; i-- ) {
str += (
space.repeat( (breakPoint - i) ) +
"*".repeat( 2 * i + 1 ) +
"\n"
);
}
console.log( str );Another approach could be to Keep It Simple Stupid (KISS):
let input = 7;
let space = " ";
***/
let breakPoint = Math.floor(input / 2); // 3
let str = "";
let spaces = breakPoint; // (3)
let stars = 1;
for( let i = 0; i < breakPoint; i++ ) {
str += (
space.repeat(spaces) +
"*".repeat(stars) +
"\n"
);
spaces -= 1;
stars += 2;
}
for( let i = breakPoint; i >= 0; i-- ) {
str += (
space.repeat(spaces) +
"*".repeat(stars) +
"\n"
);
spaces += 1;
stars -= 2;
}
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