Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	for _, leftValue := range MultiplicationTableNum(9) {
		for _, rightValue := range MultiplicationTableNum(9) {
			strLeftVal, strRightVal, strMulti := strconv.Itoa(leftValue), strconv.Itoa(rightValue), strconv.Itoa(Multiplication(leftValue, rightValue))
			fmt.Println(strLeftVal + "x" + strRightVal + "=" + strMulti)
		}
	}
}

func MultiplicationTableNum(num int) []int {
	multiNum := []int{}
	for i := 1; i <= num; i++ {
		multiNum = append(multiNum, i)
	}
	return multiNum
}

func Multiplication(x, y int) int {
	return x * y
}

C++: #include <algorithm>
#include <bitset>
#include <cassert>
#include <cmath>
#include <ctime>
#include <cstring>
#include <functional>
#include <iostream>
#include <iomanip>
#include <limits>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <regex>
#include <vector>

#define fix(n)          cout<<fixed<<setprecision(n)
#define rep(i,n)        for (int i = 0; i < (n); ++i)
#define all(a)          (a).begin(), (a).end()
#define sort(a)         sort(all(a))
#define uniq(a)         sort(a);(a).erase(unique(all(a)), (a).end())
#define reverse(a)      reverse(all(a))
#define ctos(c)         string(1, (c))
#define out(d)          cout << (d)
#define outl(d)         std::cout<<(d)<<"\n"
#define YES()           cout << "YES" << endl
#define NO()            cout << "NO" << endl
#define Yes()           cout << "Yes" << endl
#define No()            cout << "No" << endl
#define ceil(x, y)      ((x + y - 1) / (y))
#define debug(x)        cerr << #x << ": " << (x) << '\n'
#define debug2(x, y)    cerr << #x << ": " << (x) << ", " << #y << ": " << (y) << '\n'
#define debug3(x, y, z) cerr << #x << ": " << (x) << ", " << #y << ": " << (y) << ", " << #z << ": " << (z) << '\n'
#define dbg(v)          for (size_t _ = 0; _ < v.size(); ++_){ cerr << #v << "[" << _ << "] : " << v[_] << '\n'; }
#define pb              push_back
#define fst             first
#define int             long long
#define INF             __LONG_LONG_MAX__

using namespace std;
using ll = long long;
using ld = long double;
using P = pair<ll,ll>;

const ll MOD = 1000000007; // 10^9 + 7
const int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
const int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};

void solve() {
  for (int i = 1; i < 10; i++) {
    for (int j = 1; j < 10; j++) {
      cout << i << "x" << j << "=" << i*j << endl;
    }
  }
}

signed main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  srand((unsigned)time(NULL));
  fix(12);

  solve();
}

C++: #include <iostream>

using namespace std;

int main(void)
{
	for(int i = 1; i < 10; i++)
		for(int j = 1; j < 10; j++)
		cout << i << "x" << j << "=" << i*j << endl;
	
	return 0;
}

C++: #include <iostream>

using namespace std;

int main() {
    for (int i = 1; i <= 9; i++) {
        for (int j = 1; j <= 9; j++) {
            cout << i << 'x' << j << '=' << i * j << endl;
        }
    }
    return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
        for(int i=1;i<=9;i++){
        for(int j=1;j<=9;j++){
            cout<<i<<"*"<<j<<"="<<j*i<<endl;
        }
    }
    return 0;
}

C++: #include <stdio.h>
int main()
{
     for(i=1;i<10;i++)
          for(j=1;j<10;j++)
               printf("%dx%d=%d",i,j,i*j);

     return 0;
}

C++: #include<iostream>
using namespace std;

int main()
{
	int a=0,b=0,c=0;
	for(int i=0;i<9;i++)
	{
		a++;
		for(int j=0;j<9;j++){
			b++;
			c=a*b;
			cout<<a<<"x"<<b<<"="<<c<<endl;
		}
	}
}

C++: #include <iostream>
using namespace std;

int main()
{
  for (int i = 1; i <= 9; i++){
    for (int j = 1; j <= 9; j++){
      cout << i << 'x' << j << '=' << i * j << endl;
    }
  }
  return (0);
}

C++: #include <iostream>
using namespace std;
int main()
{
	int a;
	for(a=1;a<=9;a++)
	{
	cout<<a<<"*"<<a<<"="<<a*a<<endl;
	}

getchar();
getchar();
return 0;
}

C++: #include <iostream>
using namespace std;
 int main(){
	 for(int i=1;i<=9;i++){
		  for(int j=1;j<=9;j++){
		      cout<<i<<"x"<<j<<"="<<i*j<<endl;
		      }
		 }
 return 0;
 }

C++: #include <stdio.h>

int main(void)
{
	int x, y;
	
	for (x = 1; x <= 9; x++){
		for (y = 1; y <= 9; y++){
			printf("%dx%d=%d\n", x, y, x * y);
		}
	}
	
	return (0);
}

C++: #include<stdio.h>
int main(){
	for(int i=1;i<=9;i++)for(int j=1;j<=9;j++)
		printf("%dx%d=%d\n",i,j,i*j);
}

C++: #include <iostream>
int main()
{
  for (auto i = 0; i < 81; i++) {
    std::cout << (i / 9 + 1) << 'x' << (i % 9 + 1)
	      << '=' << ((i / 9 + 1) * (i % 9 + 1)) << std::endl;
  }
}

C++: #include<iostream>
using namespace std;

int main(){
	int i,j;

	for(i=1;i<10;i++){
		for(j=1;j<10;j++){
			cout << i<<"x"<<j<<"="<<i*j<< endl;
		}
	}

    return 0;
}

C++: // big_number.cpp : Defines the entry point for the console application.
//


#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main()
{
	for (int i = 1; i <= 9; ++i)
	{
		for (int j = 1; j <= 9; ++j)
		{
			cout << i << "*" << j << "=" << i*j << endl;
		}
	}

	return 0;
}

C++: #include <stdio.h>
int main(int argc, char *argv[])
{
	for(int i=1;i<10;i++)
	{
		for(int j=1;j<10;j++)
		printf("%dx%d=%d\n",i,j,i*j);
	}
	return 0;
}

C++: #include <cstdio>

using namespace std;

int main() {
  for (int i = 1; i <= 9; ++i) for (int j = 1; j <= 9; ++j) {
    printf("%dx%d=%d\n", i, j, i*j);
  }

}

C++: #include <iostream>;
 
using namespace std;
int main(){
for (int i=1;i<=9;i++)
{
	cout<<i<<"*"<<i<<"="<<i*i<<endl;
}
   
  	return 0;
}

C++: #include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rrep(i,n) for(int i = 1; i <= (n); ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
using namespace std;
typedef long long int ll;
#define dame { puts("-1"); return 0;}
#define yn {puts("Yes");}else{puts("No");}


int main() {
    srep(i,1,10){
        srep(j,1,10){
            cout << i << 'x' << j << '=' << i*j << endl;
        }
    }
    return 0;
}

C++: #include <stdio.h>
int main(void)
{
  int i,j;
  for (i=1;i<=9;i++){
    for (j=1;j<=9;j++){
      printf("%dx%d=%d\n",i,j,i*j);
	}
  }
  return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
int main(){
for(int i=1;i<10;i++) for(int j=1;j<10;j++) cout << i << "x" << j << "=" << i*j << endl;
return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
    for(int i=1;i<10;i++)
        for(int j=1;j<10;j++)
            cout << i << "x" << j << "=" << i*j << endl;
        return 0;
}

C++: #include <iostream>

int main()
{
    for(int i = 1; i<10; i++) {
        for(int j = 1; j < 10;j++) {
            std::cout << i << * << j << = << i*J << std::endl;
        }
    }
    return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
	int i;
	int j;

	for(i = 1; i <= 9; i++){
		for(j = 1; j <= 9; j++){
			cout << i << "x" << j << "=" << i * j << endl;
		}
	}

	return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
	int a,i,j;
	for(i=1;i<10;i++){
		for(j=1;j<10;j++){
			a=i*j;
			cout<<i<<"x"<<j<<"="<<a<<endl;
		}
	}
    return 0;
}

C++: #include?? <cstdio>
int main()
{
for(int i=1;i<=9;i++)
for(int j=1;j<=9;j++)
printf("%dx%d=%d\n",i,j,i*j);
}

C++: #include<iostream>
using namespace std;

int main(){
	for(int i=0;i=<9;i++){
		for(int j=0;j=<9;j++){
			cout << i << 'x' << j << '=' << i*j << endl;
		}
	}
	return 0;
}

C++: #include<stdio.h>
#include<string.h>

int main(void)
{
  int i, j, k;

  for(i = 1 ; i <= 9 ; i++)
    {
      for(j = 1 ; j <= 9 ; j++)
	{
           k = i*j;
           printf("%dx%d=%d\n", i,j,k);
	}
    }           
}